{ "id": "sao-paulo", "title": "São Paulo", "lang": "en", "source_lang": "en", "summary": "São Paulo is Brazil's largest city and a leading financial, industrial and cultural centre in the Southern Hemisphere.", "category": "geography", "subcategory": "", "type": "place", "aliases": [ "Sampa", "City of São Paulo" ], "generated_at": "2026-10-09", "model": "pro/claude-haiku-5-5", "url": "https://aiwiki.page/en/sao-paulo/", "translations": { "zh-Hans": { "url": "https://aiwiki.page/zh/sao-paulo/", "json": "https://aiwiki.page/zh/sao-paulo.json" } }, "sections": [ { "heading": "", "text": "São Paulo is the most populous city in Brazil and the capital of the state of São Paulo. Its metropolitan region is among the largest urban agglomerations in the world, and the city is classified as an alpha global city. Founded by Jesuit missionaries in 1554 on a plateau of the Brazilian Southeast, it grew from a small colonial village into the country's principal economic hub, shaped first by the coffee economy of the nineteenth century, then by industrialization and rapid urbanization in the twentieth. Today it is a centre of finance, corporate headquarters, manufacturing, culture and higher education, and it hosts one of the most diverse populations in the world.\n\nThe entry explains how the city's physical setting, from its highland site and river network to its subtropical climate, shaped its growth and its environmental challenges. It then traces the city's history from its colonial origins through the coffee boom, immigration and industrial expansion, and sets out how its urban form, transport network and metropolitan governance developed. The later sections cover the economy, population and cultural life, and the water, biodiversity, climate and social issues the city faces now." }, { "heading": "Name, location and setting", "text": "The city takes its name from Saint Paul. On 25 January 1554, the feast of the Conversion of Saint Paul, Jesuit priests Manuel da Nóbrega and José de Anchieta celebrated the first Mass at their mission and named it São Paulo. The name joined the saint's feast day with the Jesuits' understanding of the site's indigenous name, Piratininga. That Tupi term is usually glossed as \"place where fish dry,\" a reference to fish left on the Tietê River floodplains after seasonal floods. The name therefore records a religious calendar date, not a coastal landmark or a founder's surname.\n\nThe settlement was set up on a plateau well inland. Its elevation is about 800 metres (roughly 2,600 feet), and the Jesuits reached it by climbing the steep floodplain-fringed escarpment from the coastal village of São Vicente. Its distance from the coast varies by source, from roughly 55 to 70 km. That combination of height and separation from the Atlantic gave the early settlement a cooler, more sheltered setting than the humid coastal lowlands, and for generations it stayed small and somewhat cut off from the sea. Those conditions also shaped the later climate and transport patterns discussed below.\n\nThe city lies in southeastern Brazil, in the state of São Paulo, which borders the Atlantic to the southeast and shares boundaries with Minas Gerais, Rio de Janeiro, Paraná and Mato Grosso do Sul. The state capital is also the largest city in the country. The state itself is the most populous and economically productive in Brazil, with more than a fifth of the national population, and it produces more than half of the country's manufactured goods. Its economy spans industry, finance, commerce and a highly mechanised agricultural sector, including large coffee and sugarcane output.\n\nThe city is tied to its region by a dense network of roads and rail lines. The Rodovia Anchieta, opened in stages from 1947 and 1953, descends the Serra do Mar to the port of Santos, and its construction required many bridges and tunnels along steep cliffs. The Rodovia dos Imigrantes, inaugurated in 1976, follows a similar route on a shorter, newer alignment. Santos is the country's busiest port, and the state's road network links the city with the coffee and agricultural zones of the interior. The federal BR-050 highway carries goods from Minas Gerais toward Santos, while the Presidente Dutra highway provides the principal road link to Rio de Janeiro. Historically, the railway from Santos up to Jundiaí played a comparable role in moving freight and passengers between the plateau and the coast." }, { "heading": "Physical geography and relief", "text": "The municipality sits on a highland surface that averages close to 800 m above sea level, although the Atlantic is only about 70 km away. The city is on a plateau placed beyond the Serra do Mar, itself a component of the vast region known as the Brazilian Highlands. Its territory of roughly 1,500 km² is drained mainly by the Tietê River and its tributaries, which give the urban area its basic hydrographic framework predominantly drained by the Tietê River and its tributaries.\n\nThe three rivers that most shape the city's layout are the Tietê, the Pinheiros and the Tamanduateí. Their floodplains acted as natural and historical limits on growth: from the 1870s, when the city outgrew its central area, expansion was channelled around these low, flood-prone belts The Tiete, Pinheiros and Tamanduatei floodplains have been the natural and historical limits of this urban expansion since 1870s. The Pinheiros, about 25 km long within the city, is a tributary of the Tietê and was known as the Jurubatuba until 1920, when its name changed after it was channelized runs 25 kilometres (16 mi) through the city of São Paulo; Until 1920, the river was known as Jurubatuba. After being channelized its name was changed to Pinheiros.. The gradient on the Tietê and Pinheiros is so slight that, in their natural state, both rivers meandered across very broad flood areas this river and also its main tributary, the Rio Pinheiros, present a very low slope, which means that, in its natural structure, forms a series of meanders and occupies an enormous floodplain. Engineers later straightened these courses to speed the flow of water and reduce disease, a change documented in mapping that compares the original and corrected channels a map measuring 5 meters long and almost 2 meters high compares the original—winding—courses of the Tietê and Pinheiros rivers as they crossed Greater São Paulo in 1916, with their corrected courses, in 2013. Therefore, it was to make the rivers flow faster and prevent disease that engineers ordered the straightening of channels along the Tamanduateí and Tietê.\n\nThe Serra do Mar is the single most important feature of the wider relief. It is a long system of mountains and escarpments that runs parallel to the Atlantic coast, and its main escarpment forms the boundary between the coastal lowland and the inland plateau The main escarpment forms the boundary between the sea-level littoral and the inland plateau, which has a mean altitude of 500 to 1,300 metres. In the early colonial period this barrier made trade between the coast and the interior difficult, because its sharp peaks and dense forest were hard to cross The sharpness of its peaks and the dense rain forest combine to form an almost impenetrable barrier from the Brazilian plateau to the sea. During the early colonial period it was a great obstacle to trade and commerce between the coast and São Paulo.. Indigenous peoples had long known the passes, and colonists learned them from them Amerindians had long known about passages through the Serra do Mar and taught the European colonists about them.. Later attempts to cross the range produced a stone road in 1790, which was poorly maintained, and a railway franchise granted in 1840, which was only completed in 1863 In 1790 a stone road was built across the Serra, but it was not kept in repair and eventually deteriorated until unsafe for use. A franchise was granted in 1840 to Thomas Cochrane, an Englishman, to build a railroad across the escarpment, but difficulties in financing and engineering delayed completion of the project until 1863.. The escarpment near São Paulo also receives some of the heaviest rainfall in the country, which feeds the rivers that cross the plateau The greatest rainfall in the country occurs on the escarpment near São Paulo..\n\nWithin the urbanized area the terrain is mostly rolling rather than flat, with the exception of the north. Rolling terrain prevails within the urbanized areas of São Paulo except in its northern area, where the Serra da Cantareira Range reaches a higher elevation and a sizable remnant of the Atlantic Rain Forest. Some of the higher ground is older rock that resisted erosion while the surrounding surface was lowered; the Jaraguá and Cantareira ranges are residual reliefs of this kind, formed from quartzite and granite respectively this is the case of the Jaraguá and the Serra da Cantareira in São Paulo, which constitute residual reliefs of the 800–1,000 metre peneplain because they are made of quartzite and granite respectively.. Such uneven ground affects where settlement can take place, how far slopes can be built on, and how costly it is to lay roads, drains and utilities, since steep sites demand more earthworks than the flat river terraces.\n\nLarge reservoirs in the southern and western outskirts now form a significant part of the water supply, and they sit on land that is increasingly built up. No large natural lakes exist in the region, but the Billings and Guarapiranga reservoirs in the city's southern outskirts are used for power generation, water storage and leisure activities, such as sailing. The Billings is the larger of the two, covering 127 km², and it began as a hydroelectric scheme in the late 1920s The Billings Reservoir (locally known as Represa Billings) is the largest reservoir in São Paulo, Brazil, covering a total of 127 km2 (49 sq mi). The hydroelectric projects were built starting in 1927, and the first phase was completed between 1935 and 1937.. The Guarapiranga, which was built in 1906, began supplying drinking water in 1928 The Reservoir of Guarapiranga was constructed in 1906 by the São Paulo Tramway, Light and Power Company, also known as \"Light\", which was the company responsible for the regions supply of electrical energy at that time. In 1928, Guarapiranga began being used as a reservoir for potable water distribution.. Together the two systems supply a large share of the metropolitan population, and the pressure on them comes mainly from urban growth. Both are relatively shallow, with maximum depths of about 25 m and 13 m respectively the maximum depths of each reservoir are 25 and 13 m, respectively, and are thus considered to be shallow reservoirs.. Unregulated housing in the Guarapiranga catchment has added human waste, garbage and eroded sediment to the water The Guarapiranga Reservoir is an example of a Drinking Water Source which is being increasingly polluted by unregulated population growth (favelas) in the watershed. This has led to a lot of human waste and garbage entering the reservoir along with sediment eroded from the deforested areas, while the Billings has faced similar problems with unapproved settlement in its surroundings In recent years, there have been problems with wastewater and garbage such as plastic bottles, as well as problems associated with unapproved human settlement in the surrounding regions.." }, { "heading": "Climate and weather", "text": "São Paulo's climate falls into the humid subtropical category, with no pronounced dry season. Within São Paulo, the prevailing climatic conditions align with the Cfa classification in Köppen's climate system. The city's height moderates this type of climate. It sits at an elevation of 754.74 meters above sea level, so its temperatures stay milder than those of lower-lying cities at a similar latitude. One climate summary puts the annual mean at about 21 °C, slightly below the Brazilian national average.\n\nSeasonal contrasts are moderate rather than extreme. Summer afternoons are warm and humid, and the city experiences warm summers with average temperatures between 25°C (77°F) and 30°C (86°F). Winters are cooler but seldom harsh. One widely cited series gives July as the coldest month, with average lows near 14 °C. Frost is more characteristic of the wider state than of the city centre. Vast areas of Minas Gerais and São Paulo register occurrences of frosts, after the passage of the polar fronts. The lowest temperatures are at the highest elevations, so the surrounding highlands experience frost far more often than the urban lowlands.\n\nRainfall is strongly seasonal. The wet season runs roughly from October through March, when hot, humid afternoons spawn frequent thunderstorms. The cooler, drier months from about May to September see far less rain. Published annual totals vary by reference period and station. Figures range from about 1,350 mm in one summary to roughly 1,540 mm in another, so readers should check official station records before relying on a single number.\n\nUrban growth has altered local temperatures considerably. Satellite-based work shows that the city's built-up core runs much hotter than its surroundings. In one recent study, surface temperatures in the most urbanized areas of Greater São Paulo reach up to 60 °C in the summer, and temperatures in the hottest urbanized areas of the region were, on average, between 7 °C and 12 °C higher than in cooler areas during the summer. Dense construction is a key driver. Surface temperature anomalies are associated with high building density and less ground plant cover. Compact building masses also slow air movement, which holds heat and pollutants close to street level. Some analyses find that the effect is strongest at night rather than in the afternoon, and São Paulo appears among the Brazilian cities where the nocturnal heat island is more pronounced.\n\nThese temperature patterns have direct health consequences. Heat exposure is more severe for poorer residents. In one comparison of informal settlements, favelas emerge as localized heat hotspots (mean LST: 40.6 °C) embedded within a heterogeneous thermal landscape. Modelling research has also linked urban heat to mortality, and elderly people in São Paulo are at increased risk of heat-related mortality. Heatwave estimates from one study put heat-related deaths during a recent episode at 394.\n\nRainfall extremes are a parallel concern. A study of the metropolitan area found that both the total rainfall and the frequency of extreme rainfall events in metropolitan São Paulo have increased significantly in the last seven decades. Researchers attribute the trend partly to natural variability and partly to global warming and urbanization. In the metropolitan area, extreme rainfall events represent hydro meteorological hazards that trigger flash floods and landslides. The damage is concentrated where people live in unsafe places. An increase in extreme rain events is accompanied by an inappropriate occupation of vulnerable areas, such as slopes and banks of watercourses. During a February 2020 storm, four people died and 63 were left homeless due to landslides, according to the Civil Defense of São Paulo.\n\nThe same climate system produces both flooding and shortages. Despite wet summers, São Paulo depends on reservoir systems that need consistent rain to stay full, and when the rains underperform for a stretch, supplies can fall dangerously low. The city went through a severe water crisis in the mid-2010s, when its main reservoir system dropped to critically low levels and rationing loomed. Across much of Latin America, climate hazards tend to weigh most heavily on poorer households who live on the riskiest sites." }, { "heading": "Colonial origins and early development", "text": "The settlement that became São Paulo was founded on 25 January 1554 by the Jesuit priests Manuel da Nóbrega and José de Anchieta, who set up a mission college, the Colégio de São Paulo de Piratininga, on a plateau between the Tamanduateí and Anhangabaú rivers. The date marked the feast of Saint Paul's conversion, and the place name combined that feast with the Jesuits' understanding of the local indigenous name. The site was about 68 km inland from the coastal village of São Vicente, and the only link to the coast was a rough path through the forest and over the escarpment, which kept the village cut off for long periods.\n\nThe mission's aim was to convert and educate the Tupi-Guarani peoples of the plateau, and the Jesuits also learned the Tupi language and compiled a grammar and dictionary. Its early population, however, was mixed. Portuguese colonists settled alongside two Guaianá groups, and settlers who relied on enslaved indigenous labour often opposed the Jesuits' protection of converted people. In 1560, colonists from the nearby town of Santo André da Borda do Campo moved into the walled mission compound after attacks, and the municipal council of São Paulo was established that same year.\n\nFor roughly two centuries the village remained small and comparatively isolated, serving mainly as a launching point for expeditions. From the early seventeenth century, the paulista bandeiras (expeditions led by the bandeirantes) left the village for the interior in search of indigenous labour, precious metals and stones. These expeditions opened large parts of the interior to Portuguese control, and their profits from enslaving indigenous people brought modest wealth to some residents who improved the village's buildings. Gold discoveries in the 1690s in what became Minas Gerais drew the bandeirantes' attention further inland. Their claim to priority in those mining districts led to the War of the Emboabas (1707–1709), a conflict with outsiders from other captaincies and Portugal. The village's own economy remained mainly that of a supply and trading point, and sugar and cotton became more significant local crops only after the mid-nineteenth century.\n\nAdministrative status rose gradually. The seat of the captaincy of São Vicente moved to São Paulo in 1681, and the village became the capital of the captaincy of São Paulo and Minas de Ouro in 1710. On 11 July 1711, a royal order signed in Lisbon raised the settlement from a vila to a cidade, although the municipal council only learned of the honour months later. The new status allowed the city to host a governor and, eventually, a bishop. A diocese was established in 1745.\n\nUnder the Portuguese crown, the captaincy's status changed again in 1822, when the region became part of the newly independent Empire of Brazil. Dom Pedro declared independence on 7 September 1822 on the Ipiranga plain, which is now within the city limits, and he was acclaimed emperor the following month. The town was still modest by 1840, with around 20,000 inhabitants centred on a low hill and the Anhangabaú valley. The city's growth into a major centre came mainly from the coffee boom of the following decades, which is discussed in the next section. The Faculdade de Direito do Largo de São Francisco, founded in 1827 and recognised as Brazil's oldest law school, was an early sign of the city's growing institutional role." }, { "heading": "Coffee economy and railways", "text": "Coffee gave the São Paulo region its nineteenth-century economic direction, but the crop had to reach the sea before it could earn anything. The idea of a railway to the coast dates to the 1830s, when Brazilian planters sought a cheaper way to move their harvests to port. The Brazilian government granted a concession in 1856 for a line from Santos to Jundiaí, about 70 km north of the city of São Paulo. The line opened in 1867 as the São Paulo Railway, and the entrepreneur Irineu Evangelista de Sousa, the Viscount of Mauá, was among the figures who persuaded the imperial government that a trunk line was essential for coffee shipments.\n\nThe route itself was a major engineering problem. Construction began in 1860 and had to cross the almost vertical slopes of the Serra do Mar, which separates the interior from the coast. The line depended on cable-hauled inclines and later on a rack system; today, over a stretch of just 8 kilometers, the trains overcome an elevation change of about 800 meters. Because the railway's cost and gradient shaped every shipment, the capital's own rail terminal at Luz was also built in the late nineteenth century with the purpose of being the headquarters of the newly founded São Paulo Railway.\n\nThe interior network was built by planters themselves. Coffee growers around Campinas complained that roughly a tenth of their costs went to hauling beans to Santos, and the British-owned line stopped at Jundiaí, so they built their own connections. The São Paulo Railway's British owners reflected the government's preference for private development of railways, which is why farmers west of Jundiaí had to band together and build their own line. Campinas planters financed a short line to Jundiaí in 1868 to cover the short 25 miles from Campinas to Jundiai. The Companhia Paulista followed in January 1868, and the company was created with the objective of selling the coffee produced in the interior of the state. The rail network thus pushed the frontier of coffee westward, and when construction began on the railroad in 1872, São Paulo was producing less than 20% of Brazil's coffee. By 1890 São Paulo was producing 50% of Brazil's coffee.\n\nProfits from the crop flowed into the wider urban economy. Planters were not only exporters; coffee planters were among the early industrial investors. Early manufacturing in the state was closely tied to agriculture, and the growth of textile production, for example, followed from the cotton plantations. The same capital and transport links that moved coffee to the port also supported the commercial activity that concentrated in the capital.\n\nLabour was the other pillar of the boom. After abolition in 1888, planters relied on immigrants. From 1884 to 1914, more than one million mostly Italian colonos arrived on São Paulo's plantations under a federally subsidized passage-payment scheme. Most were poor, many returned to Italy, and some eventually bought land of their own. Italian settlement was concentrated in the São Paulo region, where there were vast coffee plantations. Conditions on the farms led to crises and reforms; the Italian government's 1902 Prinetti Decree banned subsidized immigration to Brazil due to reports that Italian immigrants were being exploited as laborers on Brazilian farms. Still, between 1882 and 1914, 1.5 million immigrants of different nationalities came to São Paulo, and 695,000 left the state, or 45% of the total.\n\nJapanese immigration began in 1908 and was also directed toward coffee. Japanese workers replaced European immigrants on the burgeoning coffee plantations of São Paulo state. Many did not stay in the fields. Japanese immigrants started settling in the Liberdade region in 1912, coming from the interior of São Paulo, as many did not adapt to working on coffee farms and started looking for better opportunities in the capital. By 1893, foreigners made up over 55 percent of São Paulo's population. These movements of labour, along with the rail links that bound the capital to the plantations, laid the groundwork for the city's later industrial and demographic growth." }, { "heading": "Industrialization and mass migration", "text": "Between about 1890 and 1920 the city's population multiplied several times over. Its count rose from roughly 65,000 in 1890 to nearly 600,000 by 1920, and the growth came mainly from overseas arrivals from Italy, Portugal, Spain, Japan and the Middle East. Italians were the largest single group. The 1920 census recorded about 389,000 Italian-born residents in the state of São Paulo, who made up 48% of its foreign-born population, ahead of Spanish (21%) and Portuguese (20%) residents. Many newcomers had first worked on coffee plantations under contract and then moved to towns once those contracts ended, so the capital absorbed a large share of them.\n\nCoffee profits did not simply leave the city. Planters reinvested in industry, partly because the coffee trade itself needed equipment. Beans had to be hulled, dried and sorted before sale, and labour shortages encouraged workshops that built machines for these tasks. Although some of the mechanics who designed this equipment were German, English or Italian, the capital and initiative behind the workshops were largely Paulista. Historians generally describe the shift toward industrial capitalism as gradual, stretching from the 1920s into the mid-1950s rather than arriving with a single break. The number of industrial firms in the state grew sharply in these decades, and the city's industrial base expanded accordingly.\n\nThe 1930 Revolution and the political changes that followed accelerated this transition. Federal measures to support coffee prices protected many plantations, but the sector's recurring overproduction and price crises pushed capital and workers toward manufacturing. Textiles, food processing and chemicals formed the first layer of the new industrial base, and automobile assembly and other heavier branches came later. Mid-century industry therefore rested on a mix of immigrant and planter-derived enterprise rather than on a single foreign investor.\n\nFrom the 1940s and 1950s, internal migration became the other great source of population growth. Workers from the poorer northeastern states and from the interior were recruited, often through state-managed agencies, to fill factory jobs and building work. Migration was not new in this period: official records show that in 1937 about 72,000 northeasterners passed through the state's immigrants' hospice, which indicates how early the flow had begun. These migrants settled mostly in the outer districts, where land was cheaper, and they formed a large working class that expanded the peripheral areas of the city.\n\nIndustrial zones grew along railway lines, which shaped where factories were built. The São Paulo Railway opened a station at Brás in 1867, and the Northern Railway's terminal followed in 1875. Barra Funda gained a rail line in 1875 that stimulated commercial and industrial development, and by the mid-twentieth century it had become an industrial stronghold of factories and warehouses. Bom Retiro, originally an industrial district, attracted Mediterranean immigrants, including Italians and Levantine Arabs, before its factories were gradually replaced by clothing retail in the 1960s. These patterns explain why industrial land often sits close to the railways and why such districts became home to immigrant and working-class communities.\n\nPopulation figures for the period differ between sources. One source puts the city at about 1.3 million in 1940, while another gives nearly 2 million for the same period, a gap that reflects differing boundaries and counting methods." }, { "heading": "Urban form, architecture and planning", "text": "The historic core, Paulista Avenue and the Anhangabaú valley together form the city's commercial and cultural centre, and several early twentieth-century buildings still stand in them. Paulista Avenue was built in 1891 by Joaquim Eugênio de Lima, a civil engineer. At the time, it was associated with São Paulo's coffee elite and designed as an elegant residential avenue. Later, office towers, banks and cultural venues displaced most of the mansions. It was the first street in the city to be paved. By the 1960s it had become one of the principal business districts, and today it hosts a financial centre alongside museums and shopping. The Anhangabaú valley has a different role: it sits between the older upper town and the commercial lower town, and in urban histories it marks the boundary between the old and the new city. Among the surviving early buildings, a residence dating from 1905 and the Casa das Rosas, begun in 1935, are considered Historical Heritage.\n\nModernist architecture gave the city some of its most recognised landmarks. Oscar Niemeyer's Copan building illustrates his approach to the street. Its 1,160 apartments of varied sizes were designed for a broad range of residents, and he allowed city dwellers literally to pass through the building at ground level. A public passage runs through the block alongside shops, cafés and a cinema, which blurs the boundary between public and private space. Construction history was irregular. The work only began in 1957 according to one account, while another dates the start to 1952; financial difficulties after the 1954 national crisis forced the project to be put on hold, and the building was not officially opened until 1966. Niemeyer also designed much of Ibirapuera Park, which was built to host the celebrations for São Paulo's 400th anniversary in 1954. Its layout pairs several differently shaped pavilions with landscaping by Roberto Burle Marx, and its open space accommodates museums and exhibitions.\n\nLina Bo Bardi's work gave the city a second, more experimental strand of modernism. The São Paulo Museum of Art (MASP) was designed by Lina Bo Bardi and built between 1957 and 1968, and it is a glass-fronted volume raised above the street on red pillars, which opens the ground plane to pedestrians. Her later conversion of a derelict factory at SESC Pompéia reflects a different concern with reuse. Between 1977 and 1986 she kept the old red-brick sheds, threaded culture, sport and leisure through the industrial shells, and added two raw-concrete towers linked high in the air by diagonal aerial walkways. Her buildings are often read as examples of an extraordinary fusion of European modernism and Brazilian popular culture.\n\nVertical growth reshaped the urban fabric from the middle of the twentieth century. Rising land values in the centre, the availability of reinforced concrete and the arrival of large numbers of migrants encouraged apartment blocks and office towers to replace many detached houses and low-rise buildings. Residential high-rises spread along the main avenues and into the districts south and west of the centre, while office clusters concentrated around the Paulista and the central business area. This pattern created a dense, uneven skyline in which older, lower buildings remain mixed in among newer towers.\n\nPlanning in São Paulo has largely been reactive, responding to rapid growth with road building and ad hoc renewal schemes. The Nove de Julho tunnel, built beneath Paulista Avenue and opened on July 23, 1938, is one example of the road infrastructure that linked the south of the city to the centre. Urban renewal has sometimes focused on individual districts, and it has often left services unevenly distributed, with the best transport, cultural facilities and public amenities concentrated in the central and western areas while the outlying districts received less. These imbalances remain a central issue in debates over urban planning and the design of new public space." }, { "heading": "Metropolitan region and governance", "text": "\"Greater São Paulo\" is an informal label that covers several overlapping boundaries, so the figures for the wider area depend on which one is used. The most formal of these is the metropolitan area defined in law: a legally defined specific term, Região Metropolitana de São Paulo (RMSP), one definition for Metropolitan São Paulo, consists of 39 municipalities, including the state capital. The perimeter was created by federal complementary law in 1973, when the country was under military rule. The original set of 37 municipalities was enlarged by an additional municipality in 1983, and another in 1991, which produced the present total.\n\nThe legal basis for metropolitan governance changed with the 1988 Constitution. Earlier, the federal government held the power to create metropolitan regions. Under the new text, the authority to create metropolitan regions shifted from the federal government to the states. São Paulo state then built a structure in which a state-level planning enterprise, created in 1974, handled coordination. The enterprise was called EMPLASA. In 1994, a complementary law created a development council made up of one representative per municipality together with state representatives. A 2011 state law later reorganized these institutions and created a new development council. Under that law, each mayor or his or her representative sits on the council, along with state representatives on issues of common interest, and two members of the Legislative Assembly. The law also stresses parity between the municipalities and the state. EMPLASA itself was dissolved in mid-2019, as part of an official state programme to dismantle public administration, after more than four decades of metropolitan planning work.\n\nCoordination has remained weak in practice. One assessment notes that the metropolitan structures provide little authority and coordination, and rely on fiscal systems tied to the past. In the broader macrometropolitan area, there is no administrative body with the powers and managerial capacity to deal with the territory as a whole, and planning in the metropolitan area has often been restricted to specific issues such as transportation. Transport is handled by separate bodies: SPMR transportation is overseen by the Metropolitan Enterprise for Urban Transportation and the São Paulo Company for Metropolitan Trains. This fragmentation means that a single daily commute can cross the responsibilities of several bodies at once. Shared questions of urban planning, housing, water and environmental management therefore fall to a mix of municipal, state and federal actors, with no single authority over the whole labour market.\n\nPopulation figures for the region vary with the definition in use. The 2014 census counted 21.1 million inhabitants in the legal perimeter, while the 2011 census recorded 19,672,582 inhabitants for the same 39 municipalities. More recent estimates for the legal region give a total population of 21,555,260 inhabitants (2025 population estimates). The municipality of São Paulo itself is counted separately: the largest municipalities are São Paulo, with a population of 11,451,245. Because the census year, the boundary and the choice of municipal or metropolitan figures all differ, comparisons between sources need care. Broader planning frameworks produce different totals again. EMPLASA described a larger macrometropolis that brings together four metropolitan areas, São Paulo, Campinas, Santos and Vale do Paraíba, and two 'urban agglomerations', Jundiai and Sorocaba.\n\nThe economic weight of the legal region is considerable. In an analysis based on EMPLASA data, the RMSP accounted for 56.4% of the state's GDP and for 47.9% of the population. This concentration is one reason the region's coordination problems matter beyond the city, since decisions on housing, urbanization and infrastructure in the outlying municipalities affect the functioning of the whole state economy." }, { "heading": "Population, diversity and communities", "text": "The municipality of São Paulo recorded 11,451,999 residents in the 2022 census, and the official 2025 estimate rose to 11,904,961. The metropolitan region is considerably larger. Its 2022 population is put at approximately 21 million inhabitants, and a 2025 figure of 21,518,955 is given for Greater São Paulo. Because the boundaries of the region are drawn in different ways, figures for it vary between sources.\n\nThe city's population has been shaped by successive waves of migration. Between 1885 and 1927, around 2.5 million foreign immigrants arrived in São Paulo, drawn by the growth of coffee production and urbanization. Italians were the largest group in this period: between 1872 and 1950 more than a million Italians entered São Paulo, followed by Portuguese, Spanish, Japanese, German and Lebanese arrivals. Today the city is often described as the largest centre of Italian ancestry anywhere, with São Paulo being the most populous city with Italian ancestry in the world. The Japanese community also grew steadily, from 120,000 in the city in 1958 to 326,000 by 1987. Arab migration, particularly from Muslim-majority and Christian Levantine areas, was concentrated in commerce and retail in the central districts.\n\nSeveral central neighbourhoods carry the names of these communities. Directly south of Sé Square is Liberdade, São Paulo's large and colourful Asian (largely Japanese) district, which also houses a museum of Japanese immigration. West of Liberdade is the city's Italian district, Bixiga. Bom Retiro has changed hands several times. It was traditionally home to immigrants from the Middle East and a large Jewish community, but since the 1970s populated by Korean immigrants. More recently, Bolivians are by far the largest group; they began emigrating to Bom Retiro in the 1990s to work in the textile industry. Despite this reputation, a slight majority of residents are in fact Brazilian.\n\nMost of the city's growth after the mid-twentieth century came from within Brazil rather than from abroad. After 1950, the number of immigrants arriving in São Paulo decreased and migrants from other Brazilian regions, particularly the poor Northeast State, took over. In the central Sé and Brás area, the largest concentration of northeastern migrants was found in the area of Sé/Brás (districts of Brás, Bom Retiro, Cambuci, Pari and Sé). In this area they composed 41% of the population. The foreign-born population of the municipality itself is small in relative terms. In 1991 it was an estimated 219,178 foreigners (or 2.3 per cent of the total population), and during the 1990s, the foreign population in São Paulo fell by 16.3 per cent. Immigrants nonetheless remain a visible presence in some districts. In some administrative districts such as Moóca, Bom Retiro and Vila Maria they represent significant portions of the population.\n\nDemographic structure now shapes the city's public needs. The 2022 census counted 1,953,306 residents aged 0 to 14 and 1,416,641 aged 65 and over in the municipality, and the number of women exceeded the number of men, at 6,065,304 against 5,386,695. Growth at the metropolitan edge and an older population in the core create different demands for housing, schools, health care and transport, which in turn affect planning decisions across the region." }, { "heading": "Economy: finance and corporate centre", "text": "São Paulo is Brazil's principal financial centre and is widely described as the largest financial hub in Latin America. Its position rests on the concentration of the financial market infrastructure, the headquarters of large banks and firms, and the advanced services that support them. The city's economy is also large in national terms, although its weight within Brazil has declined since the early 2000s.\n\nThe country's main securities venue, the B3 exchange, is based in the city. Its institutional roots lie in the São Paulo Stock Exchange, founded in 1890, which merged with the Brazilian Mercantile and Futures Exchange in 2008 to form BM&FBOVESPA. The group was renamed B3 after its merger with Cetip in 2017. The exchange is a stock market operator and also runs clearing, settlement, custody and registry services, so it functions as post-trade infrastructure used daily by brokers, banks and asset managers. Although many financial firms have moved out of the historic centre, the exchange remains there.\n\nMajor banks are concentrated in the metropolitan area, though not exclusively in the capital. Itaú Unibanco is headquartered in São Paulo, and Bradesco's headquarters are in Osasco, a municipality in the same state rather than in the city itself. Banco do Brasil, the state-controlled bank, is headquartered in Brasília, which illustrates that the claim of concentration needs qualification. Earlier in the twentieth century, the historic centre housed the regional headquarters of major institutions, such as Banespa in the Altino Arantes Building, and skyscrapers from that period still mark its former financial role.\n\nThe city's financial primacy developed over several decades. By 1960 the turnover on the São Paulo exchange already represented more than two thirds of the national total, and the relocation of the federal capital to Brasília that year did not reverse this trend. From the 1970s onward, the city attracted the headquarters of the largest private banks and other information-intensive firms. In 1976 it hosted 102 foreign banks. The decline of Rio de Janeiro as a financial centre, which began more than half a century ago, has continued, while Brasília has become the third most important financial centre in the country.\n\nIn national accounts, the municipality produced 10.3% of Brazil's GDP in 2019, equal to R$763.8 billion. The wider city-region, which includes 92 neighbouring municipalities, generated nearly a quarter of national GDP that year. The municipality's share nevertheless fell by 3.5 percentage points between 2002 and 2021, mainly because of a relative decline in financial activities, insurance and related services. The state's economy is overwhelmingly service-based, with services accounting for about 78% of value added in 2015, and the state holds more than half of the output of Brazilian financial institutions.\n\nThe city also serves as a gateway for global capital flows into Brazil. Many international companies operating in Brazil maintain their headquarters or main offices there, and the city's concentration of startups and technology firms has given it a growing role in innovation; a 2025 ranking placed it first among Latin American startup ecosystems. Taken together, these functions make São Paulo the organisational centre of the country's corporate and financial life, even as its share of national output has become less dominant." }, { "heading": "Industry, logistics and trade", "text": "Manufacturing in the metropolitan region covers a wide range of sectors, with motor vehicles at the centre. The state of São Paulo produces over half of the country's manufactures, and the automotive sector is its most visible example. Data cited by the state investment agency show that over 40% of plants in the Brazilian automotive complex are located in São Paulo, and that Ford, General Motors, Honda, Mercedes-Benz, Scania, Toyota and Volkswagen operate there, mostly in the metropolitan region, the Vale do Paraíba and the Campinas area. Early assembly activity had begun in the 1920s, when Ford and General Motors opened plants in the area, and by the 1950s the ABC region (Santo André, São Bernardo do Campo and São Caetano do Sul) had become the main concentration of vehicle production. Other sectors include electronics, pharmaceuticals, chemicals, machinery, processed food and consumer goods such as textiles, furniture and household appliances.\n\nManufacturing is not confined to the city's own limits. Factories are spread across the metropolitan municipalities and, increasingly, across the state. The city's own districts specialise in particular trades: Brás and Bom Retiro, for example, have long been centres of the wholesale garment trade, while other streets specialise in electrical parts, lighting and furniture. Industrial output has also moved outward to cities such as Campinas, Sorocaba, Jundiaí, Cubatão and Ribeirão Preto, which has reduced the dominance of the metropolitan core. Between 1977 and the early twenty-first century, the share of economically active people working in manufacturing in the metropolitan area fell, and services, especially business services, became the principal source of employment. Some manufacturing jobs remain in the core, but their long-term survival is uncertain, and many old factory buildings in the central districts have been converted to other uses.\n\nLogistics depends on the Port of Santos, located in the coastal city of Santos about 70 km from the metropolis. The port is widely described as the largest container port in Latin America, although rankings differ by source and year, and it handles a broad mix of cargo, including containers, solid and liquid bulk and general loads. Its main exports include coffee, sugar and soybeans, and it is associated with a large share of Brazil's foreign trade. The port's primary hinterland covers São Paulo state along with Goiás, Minas Gerais, Mato Grosso and Mato Grosso do Sul, and its operations are linked to the city through the Anchieta and Imigrantes highways and, to a lesser extent, rail. The road and rail links cross the Serra do Mar escarpment, and congestion on access routes is a recurring problem because the port operates around the clock.\n\nAir freight and passenger traffic pass through the Guarulhos International Airport, which lies in the metropolitan region and serves as a principal international gateway. Together with the port and the road network, it allows goods from the interior to reach domestic and overseas markets. Agricultural products from the interior are an important part of this flow. Coffee, sugarcane and soybeans move through the city's commercial houses, trading firms and processing networks, where they are graded, stored, financed and shipped. Agribusiness and food processing, which are concentrated in the interior, therefore depend on the city's services and infrastructure, even when production takes place far from the metropolis. The city's position as a financial and corporate centre supports these trade flows through credit, insurance and freight services.\n\nSince the late twentieth century, industrial decline in the core and the relocation of factories to the periphery and the interior have reshaped employment and land use. Former industrial zones along the rail lines and rivers, including parts of Barra Funda and the Tietê valley, have been redeveloped for housing, offices and logistics warehouses, while newer plants have been built on cheaper land in outlying municipalities and the interior. This shift has reduced the number of blue-collar jobs in the city while increasing demand for white-collar and technical work, and it has created a dispersed industrial geography in which production, distribution and consumption are linked across a wide metropolitan and state area." }, { "heading": "Transport and mobility", "text": "São Paulo's transport history runs from river and trail routes to railways, street trams, highways and, from the 1970s, a metro and bus network. The first major rail line was built by a British company. The São Paulo Railway opened on 16 February 1867, using an incline system up the Serra do Mar to link the plateau with the port of Santos. The idea for the first railway came from Irineu Evangelista de Souza, Viscount Mauá, and English companies built it in 1867 but retained a monopoly on rail transport across the Serra do Mar. Its central station, Luz, still anchors the commuter network.\n\nStreet transport followed in the 1870s. The first mule-drawn tram line in the city, between Luz station and the Largo do Carmo, opened on 12 October 1872. Electrification was proposed from 1888, but the network stayed partly animal-powered and partly steam-powered. At the turn of the century 170 passenger trams and 75 freight trams were pulled by four steam locomotives and roughly 1,700 mules, and the Ipiranga steam line and most animal lines closed in 1903. Road links became more important in the mid-twentieth century. A new automobile road, the Via Anchieta, opened in 1947, and the Via dos Imigrantes was inaugurated in 1976.\n\nThe metro came later. Construction began in 1968, and the first line opened on 14 September 1974. The metro system now carries about 4.2 million passengers a day, with 2025 annual ridership of roughly 1.27 billion. Lines are operated by the state and by private concessionaires, and the metro and suburban rail systems together form a network of 393 km that can be accessed with a single ticket. The commuter rail component is large in its own right. In 2023 the entire network recorded about 2.37 million weekday passengers, and the commuter lines operated by CPTM carried about 1.57 million of them.\n\nBuses carry most of the city's public transport trips. The bus network comprises 1,337 routes and 13,981 buses, and it serves an average of 10 million passengers per day. Bus rapid transit corridors have been added since the 2000s. São Paulo has 130 km of BRT corridors within a bus network of 4,500 km. Metropolitan corridors reach beyond the municipality, such as the 12 km Diadema–Morumbi corridor, which has a daily ridership of 85,000 passengers. Road congestion and car dependence remain strong, with about 8.9 million vehicles registered in the city in 2022, of which more than 7 million were cars and pickup trucks.\n\nElectric buses have become a central part of emissions policy. The city began a pilot fleet of battery electric buses in 2019. In October 2022 SPTrans banned the procurement of new diesel buses. The programme was expanded with international finance: the Inter-American Development Bank approved a $248.3 million programme to support electrification of the municipal public bus fleet. Reported totals vary by source and date. One recent report counts 1,759 electric buses in the municipal fleet, including 189 trolleybuses. The stated aim is to replace the diesel fleet over the coming years, and this is linked to the legal framework: a 2018 municipal law requires bus operators to gradually reduce air and climate pollutants from their fleets.\n\nAccess to these services is uneven. The electrification programme is explicitly designed around riders who depend most on public transport: the Inter-American Development Bank says the programme will target low-income citizens and women, who make up the majority of the city's public transport users. Metro stations and rail corridors cluster in the central and western districts, while many peripheral and hillside neighbourhoods rely on long bus journeys, which lengthen commuting times and raise household costs. These mobility gaps follow the same lines as income, housing location and access to employment, and they remain a persistent issue in planning debates." }, { "heading": "Culture, education and research", "text": "Museums and visual arts\n\nThe city's art institutions cluster along Avenida Paulista and in the Luz district. The Pinacoteca, opened in 1905, is the oldest art museum in the state, and its collection now numbers about 9,000 works by artists such as Anita Malfatti, Bourdelle and Rodin. Inaugurated in 1905, the Pinacoteca of the State of São Paulo is the oldest art museum in the city and state. The collection today has around 9,000 works, from artists like Anita Malfatti, Bourdelle and Rodin. Its holdings are spread across three buildings near the Luz gardens, so a visit often covers several sites in one trip.\n\nThe Museu de Arte de São Paulo (MASP) was established in 1947 by Assis Chateaubriand, a businessman and patron of the arts, and became the first modern museum in Brazil. It is a private not-for-profit museum founded in 1947 by business mogul and patron of the arts Assis Chateaubriand (1892–1968), becoming the first modern museum in the country. Its building, designed by architect Lina Bo Bardi, rests on red concrete columns above the avenue and has become one of the city's best-known landmarks. The collection holds more than 10,000 works spanning Europe, Africa, Asia and the Americas, and its glass easels, which let visitors see both sides of a painting, are a distinctive feature of its display.\n\nTemporary exhibitions and biennials add to this permanent base. The MAC USP, the University of São Paulo's contemporary art museum, sits opposite Ibirapuera Park, while the FAAP museum, linked to a private university, concentrates on Brazilian art of the twentieth and twenty-first centuries. The São Paulo Biennial is one of the city's major art events, alongside the Virada Cultural and the Jornada do Patrimônio Histórico, which bring large audiences into the city's venues each year.\n\nTheatre, music, film and literature\n\nPerforming and literary arts have a long history in the city, from the Municipal Theatre, which anchors the city's classical programming, to small independent stages in neighbourhoods across the centre and periphery. Music, film and literature have developed alongside these venues, with the city's publishing houses, cinemas and festival circuits drawing writers, musicians and filmmakers from throughout Brazil. The modernist movement of the 1920s and 1930s, centred on the city's painters, poets and writers, remains a reference point for later artistic debates.\n\nUniversities and research\n\nHigher education gives the city much of its intellectual weight. The University of São Paulo (USP), a public institution, is among the country's leading centres of research, with strong schools in medicine, engineering and the natural sciences. Several private universities, including FAAP and the Pontifical Catholic University of São Paulo, operate alongside it, and together they train a large share of the professionals needed by the city's financial, legal and health sectors. Medical research is closely tied to university hospitals, which make the city a referral centre for complex health care in the wider region.\n\nFestivals, gastronomy and nightlife\n\nFestivals, food and nightlife sustain the city's reputation as a cultural destination. Its restaurant scene reflects the immigrant communities that settled in neighbourhoods such as Bixiga and Liberdade, and its cultural calendar extends from large public festivals to late-opening museums and galleries. Together these activities draw visitors from across Brazil and abroad, and they form part of the cultural heritage that the city presents to the world." }, { "heading": "Water, rivers and wetlands", "text": "Through most of the twentieth century, the rivers that had once organised São Paulo's settlement were treated mainly as obstacles to urban expansion. Planners sought to build on the floodplains, and the Tietê in particular was treated throughout the twentieth century as an obstacle to urbanization. Its floodplain was heavily modified, and the river's course within the municipality was shortened to almost half of its original length. Sanitation engineers justified the straightening of the Tamanduateí and Tietê by arguing that faster flow would reduce disease and flooding, and that deepening the Tietê channel was the preferred answer to recurrent floods (engineers ordered the straightening of the watercourses and the opening of canals along the Tamanduateí and Tietê. The solution found to reduce the persistent floods was to deepen the channel of the Tietê.)\n\nThe changes were not confined to the Tietê. The Pinheiros was known as Jurubatuba until 1920, and after being channelized its name was changed to Pinheiros. In the 1950s, the river was further altered and directed toward the Billings Reservoir as part of the hydroelectric system. The Tamanduateí followed a similar path: until the early twentieth century its waters served as a navigable route, but dense urban occupation turned the once-winding river into a straight channel by 1930. A later engineering programme, the Cintra project, planned deepening and channelling of the Tietê in the stretch within the municipality during the 1950s and 1960s, which shows how long the approach persisted (From 1937 onwards, the Cintra project was responsible for the rectification of the Tietê and Pinheiros Rivers. The project was carried out between the 1950s and 1960s).\n\nChannelization changed the way water moves through the city. The Pinheiros floodplain was historically prone to seasonal inundation, but extensive human interventions have profoundly altered the floodplain's natural hydrology, including river rectification, channelization, and the expansion of impermeable surfaces. Engineers designed the system to move stormwater out of the urban area quickly, which made the rivers more dependent on concrete banks and pumping. The city's flood response has since included large projects such as the Parque Várzeas do Tietê, a 75 km-long floodplain restoration scheme proposed by the government of São Paulo, although research on the project has questioned how its costs and benefits fall on floodplain residents.\n\nWetlands were among the first casualties of this process. Reports and historic maps show that within the city limits alone, there were once more than 80 km of wetlands extending along the Tietê, Pinheiros and Tamanduateí Rivers. Across the wider Upper Tietê and Upper Paraíba do Sul basins, the wetlands have been almost-completely transformed by urbanization, agriculture and mining over the last 200 years. The loss has had biological consequences: the São Paulo Marsh Antwren, a bird that occurs only in this region, has lost more than 346 km2 of suitable habitat since the early twentieth century and is now classified as Critically Endangered. These losses are closely tied to biodiversity and habitat decline in the Atlantic Forest.\n\nThe city's water supply is equally dependent on engineered infrastructure. The main source, the Cantareira system, was built after the 1953/54 rainfall deficit prompted construction of the Cantareira Reservoir system. The system transfers water from the Piracicaba River Basin and is responsible for serving nearly half of the metropolitan population. Its vulnerability became clear during the 2014–2015 drought. The summer of 2014 was the warmest and driest over the Cantareira reservoir system since 1951, and in January 2015 Cantareira sank to a water volume of just 5% of capacity. The crisis spread to the second major system, since the Alto Tietê reservoir system also entered a crisis situation in August 2015. Responses included reduced water pressure in homes, incentives for saving water, and the use of groundwater from the reservoir area (reducing the water pressure to residences, a bonus for customers who save water, and exploring the reservoir's ground water).\n\nWater quality is a parallel problem. The Pinheiros is considered one of the heaviest polluted rivers in Brazil, and after 1992, increases in pollution and inadequate wastewater treatment led to a ban on reversing the Pinheiros into Billings, except during flood control. Untreated domestic sewage remains a central source of pollution along the tributaries. Clean-up efforts on the Tietê have continued for nearly three decades, but low rates of sewage collection continue to complicate the project. Stormwater management, sewage treatment and river restoration therefore remain closely linked, and they are central to the city's restoration agenda and to the wider debate over river health." }, { "heading": "Biodiversity and climate adaptation", "text": "São Paulo lies mainly within the Atlantic Forest, and remnant forest still covers a substantial part of the municipal territory. About 30.4% of the city is covered by Atlantic Forest remnants, including large fragments in the Cantareira, Parque do Carmo and Parelheiros regions. Regional estimates of how much of the biome survives vary with source and date. One older study puts the remainder of the state's two major biomes at 12 percent and 2 percent of their pre-Columbian land area, while a more recent overview gives a figure of around 29% of its original coverage for the biome as a whole. The state's Cerrado savanna has fared worse. It originally covered about 15.4 to 18.2 percent of the state, mostly in the central portion, and that proportion has been reduced to around 3 percent.\n\nProtected areas on the metropolitan edge carry much of the city's conservation load. The São Paulo City Green Belt Biosphere Reserve was added in 1994 and covers 73 municipalities in São Paulo state, including the city of São Paulo. Pico do Jaraguá, the city's highest point at 1,135 metres, sits within this network. Its forested buffer has a cooling effect on the climate of the warming city below, and the buffer zone was formally delineated as protected land in 2010.\n\nWetlands show the sharpest loss. Over roughly two centuries, the wetlands of the Upper Tietê and Upper Paraíba do Sul basins have been almost completely transformed by urbanization, agriculture and mining. Maps and documents from 1889 to 1905 record more than 410 km² of marshes and wetlands in the urban region and between Jacareí and Caçapava. The São Paulo marsh antwren (Formicivora paludicola), a small endemic bird of these basins, illustrates the cost. Historic maps and satellite imagery show that its suitable habitat has shrunk by more than 346 km² since the early twentieth century, and the species now only occupies a severely fragmented area of 1.42 km², which places it among the Critically Endangered species under IUCN criteria. Surveys estimate the total population at between 250 and 300 individuals. Research has also found that the bird avoids patches invaded by the alien ginger lily (Hedychium coronarium), so invasive plants add a further pressure on the remaining marshes. In response, a wildlife refuge covering about 2,400 hectares was declared in the municipality of Guararema, within a two-hour drive of sprawling São Paulo's city center, to protect the species' wetland habitat along the Putim River.\n\nClimate policy has been built partly around nature-based solutions and restoration of green space. Climate concern in the state dates back to the early 1990s; a 2009 state climate law set a greenhouse gas emissions reduction target of 20% by 2020. The state's later plan aims to neutralize, by 2050, the greenhouse gas emissions regulated under the Kyoto Protocol within its territory. At the municipal level, urban greening is central. More than 200 rain gardens manage stormwater runoff, and approximately 500 buildings feature green roofs, insulating buildings and managing rainwater. Urban forests and parks are also promoted as tools against urban heat and pollution, since air pollutants can also be affected by the urban heat island effect, amplifying the deleterious effects on health. These measures respond to specific local risks, including the possibility of floods and landslides from more intense rainfall, and also an increased tendency towards periods of drought. The city has also endorsed the Sao Paulo Statement on Urban Sustainability, which includes developing and implementing local biodiversity action plans to conserve and enhance urban biodiversity and urban protected areas." }, { "heading": "Housing, inequality and public services", "text": "The city's housing gap is large. One study of its residential built environment finds that the shortfall in formal housing is filled mainly by informal urbanisation, with slum upgrading and redistributive policies doing less than was intended The case study city of São Paulo has a large deficit of formal housing. This shortfall is met through informal urbanization and – despite institutional efforts to overcome precarious housing conditions – through slum upgrading and redistributive policies. Survey figures cited in the same study put about 30% of residents in precarious housing, while about 11% live in favelas According to surveys, approximately 30% of São Paulo's 12 million residents live in precarious housing. Official 2022 census figures count about 1.7 million people in 1,359 communities in the state capital In total, 1,728,265 people live in 1,359 communities in the state capital. The share has changed sharply over time. Favelas housed about 1 percent of the population in the 1970s, a figure that reached 20 percent by the early 1990s In the 1970s the favelas housed only 1 per cent of São Paulo's population, but at the beginning of the 1990s this figure reached 20 per cent. Densification has also increased, with households per hectare in favelas rising from about 14.5 in 1985 to about 65 in 2019 The density of households increased from 14.54 households per hectare in 1985 to 64.92 households per hectare in 2019.\n\nLocation and physical risk compound these deficits. Most favelas lie on the urban periphery, and some of the largest have been built so densely that adding roads and utilities is very difficult most of the favelas in São Paulo are on the periphery of the urban core, due to local geography, history, and other factors. Some large favelas house more than 60,000 people and have been built so densely that retrofitting them with roads and utility systems is extremely difficult. Many informal settlements sit on river floodplains or on hilltops mostly located in river floodplain areas or top of hills. Sealed ground and steep slopes raise the risk of landslides during heavy rain, and the 2009–10 floods, the most damaging in the city's recent history, devastated informal communities along the Tietê River The extreme high level of soil sealing and high slopes have a fundamental role to explain the increase the risks of mass movements or landslides his and other informal communities along São Paulo's Tietê River were devastated during the 2009-10 floods. São Paulo is no stranger to flood events, but between December 2009 and January 2010 the city faced its most damaging floods in contemporary history. Public housing policy has also contributed to the problem: many projects under the federal Minha Casa Minha Vida programme were placed on poorly connected fringes, which left lower-income residents with limited transport and infrastructure This policy choice relegated the majority of PMCMV housing projects to poorly-integrated fringes with underdeveloped public infrastructure.\n\nIncome inequality is among the most pronounced in the world. A public health study reports that the city's Gini coefficient was 0.57 in 1991, rose to 0.65 in 2010 and was 0.58 in 2020 its Gini coefficient was 0.57 in 1991 and 0.58 in 2020, reaching 0.65 in 2010. Spatial contrasts are equally sharp. Among the city's districts, the wealthiest reach human development levels comparable to those of high-income countries, while the most unequal districts are concentrated on the southern edge the top five wealthy districts — Moema, Pinheiros, Jardim Paulista, Perdizes and Itaim Bibi — all had HDI levels above 0.95, equal to or greater than levels found in Canada and Sweden. Cash transfers and minimum-wage increases have narrowed the gap since the 1990s The implementation of direct cash transfers from the state to families and individuals through the Bolsa Familia programme also helped reduce income inequality. Inequality also bears on health. A longitudinal study of older adults across 49 districts found higher mortality in several of the more unequal district groups, although the relationship was not a clean gradient We used survival analysis to examine the relationship between income inequality and risk for mortality among older individuals living in 49 districts of São Paulo. Compared with individuals living in the most equal districts (lowest Gini quintile), rates of mortality were higher for those living in the second.\n\nAccess to basic services varies widely. A national estimate from 2005 found that 28.5% of the urban population lacked access to public water, sewage or garbage collection, a figure that predates recent upgrades A study conducted by Brazil's Institute of Applied Economic Research (IPEA) estimated that 28.5 percent of the urban population does not have access to public water, sewage, and garbage collection services. More recent reporting states that by 2018 almost all favelas in the urban area had clean water and electricity As of 2018, almost all favelas in the urban area of the city have access to clean water and electricity.. Health outcomes follow the same pattern: a city-wide health index ranks census tracts by sanitation, water access and household income to map disparities Sanitation: proportion of households with access to sewage systems, proportion of households served by regular waste collection, proportion of households with two or more toilets; Water quality: proportion of households receiving tap water; Income: average income per household. Public safety is also linked to these patterns, since favelas are often associated with high homicide rates and drug-related crime It is not uncommon for São Paulo's favelas to have high rates of homicide and various other crimes, in addition to activities related to drug trafficking. Estimates for these indicators differ by source, year and definition, so comparisons across studies should be made with care." }, { "heading": "Global city status and international relations", "text": "São Paulo's international standing rests less on its size than on how deeply it is wired into the network of global business. The Globalization and World Cities Research Network (GaWC), based at Loughborough University, has placed the city in its Alpha tier in its 2000 list and again in its 2018, 2020, 2022 and 2024 editions. The classification is built from the activities of leading advanced-service firms across hundreds of cities, so it measures a city's role as a node in corporate decision-making rather than its headcount. In the 2024 edition the city sits in the Alpha group alongside Mexico City, Mumbai, Jakarta and Istanbul, which makes it one of several large Global South centres in that tier.\n\nIts influence extends well beyond finance. The city is described as Latin America's largest urban economy, and it is one of the region's main hubs for commerce, arts, fashion, technology and media. UNESCO has recognised it in its Creative Cities Network as a City of Film, and it holds the title of World Capital of Gastronomy. The city is also the largest Portuguese-speaking city in the world, which gives it a cultural and linguistic reach across the Lusophone world, including Portugal, Angola and Mozambique. Foreign companies reinforce this role: one widely cited estimate holds that the city hosts about 63% of the established multinationals operating in Brazil, a figure that comes from older data and should be read as an approximation.\n\nDiplomatic representation is another measure of its outward orientation. Foreign consulates and missions are concentrated here because of commercial and migrant ties, and directories give differing totals, with one listing 83 foreign representations in the municipality and others counting about 71 to 72. The gap mostly reflects whether honorary consulates, trade offices and representative offices are included. Many countries maintain consulates general in the city rather than only in Brasília, which is why it functions as a diplomatic point of contact for business and migrant communities as well as for consular services.\n\nInternational exchange also takes place through the city's exhibition and conference infrastructure. The Expo Center Norte, the Anhembi complex, the São Paulo Expo and the World Trade Center host sector fairs in fields such as security, packaging and logistics, construction, pharmaceuticals and video games, and many of these are organised as international events with foreign exhibitors and visitors. The São Paulo International Motor Show, which opened in 1960 with a reported 400,000 visitors, is an early example of the city's role as a showcase for global manufacturers. International airports, principally Guarulhos, underpin this flow of business travellers, exhibitors and tourists.\n\nComparisons with other megacities are common because of shared features. The city's Alpha-tier peers, including Mexico City, Mumbai and Jakarta, have large populations, major financial and corporate sectors and similar strains from informal settlement, traffic congestion and uneven public services. Comparison therefore tends to focus on how such cities combine global economic integration with domestic inequality, rather than on their rankings alone. Results differ depending on whether indicators such as GDP, corporate headquarters or cultural output are emphasised, so the city's global profile depends on the measure used." } ], "links": [ "brazil", "carbon", "industrial-revolution", "urbanization", "financial-market", "culture", "higher-education", "floodplain", "trade", "railway", "river", "italy", "portugal", "japan", "metropolitan-area", "urban-planning", "islam", "latin-america", "stock", "bank", "gross-domestic-product", "globalization", "innovation", "architecture", "museum", "music", "film", "literature", "modernism", "research-and-development", "public-health", "cultural-heritage", "biodiversity", "habitat", "ecological-restoration" ], "sources": [ { "title": "S%C3%A3o Paulo dos Campos de Piratininga", "url": "https://en.wikipedia.org/wiki/S%C3%A3o_Paulo_dos_Campos_de_Piratininga" }, { "title": "Joseph of Anchieta", "url": "https://en.wikipedia.org/wiki/Joseph_of_Anchieta" }, { "title": "São Paulo City - Atlantic History - Oxford Bibliographies", "url": "https://www.oxfordbibliographies.com/display/document/obo-9780199730414/obo-9780199730414-0359.xml" }, { "title": "Foundation of the city of São Paulo and the Bandeirantes", "url": "https://bahia.ws/en/fundacao-da-cidade-de-sao-paulo-e-os-bandeirantes/" }, { "title": "São Paulo", "url": "https://www.britannica.com/place/Sao-Paulo-state-Brazil" }, { "title": "Rodovia Anchieta", "url": "https://en.wikipedia.org/wiki/Rodovia_Anchieta" }, { "title": "Rodovia dos Imigrantes", "url": "https://en.wikipedia.org/wiki/Rodovia_dos_Imigrantes" }, { "title": "BR-050 (Brazil highway)", "url": "https://en.wikipedia.org/wiki/BR-050_(Brazil_highway)" }, { "title": "Rodovia dos Tamoios", "url": "https://en.wikipedia.org/wiki/Rodovia_dos_Tamoios" }, { "title": "Economy of the state of S%C3%A3o Paulo", "url": "https://en.wikipedia.org/wiki/Economy_of_the_state_of_S%C3%A3o_Paulo" }, { "title": "São Paulo", "url": "https://en.wikipedia.org/wiki/S%C3%A3o_Paulo" }, { "title": "Rediscovering Rivers in the Brazilian Megacity of San Paolo: Leveraging Water Sensitivity in the Urban Governance", "url": "https://link.springer.com/chapter/10.1007/978-3-031-65463-3_12" }, { "title": "THE TIETE RIVER STRAIGHTENING PROCESS ...", "url": "https://revistas.usp.br/paam/article/download/158617/159288/392078" }, { "title": "Pinheiros River", "url": "https://en.wikipedia.org/wiki/Pinheiros_River" }, { "title": "| São Paulo municipality at Alto Tietê River basin.", "url": "https://www.researchgate.net/figure/Sao-Paulo-municipality-at-Alto-Tiete-River-basin_fig1_357861680" }, { "title": "Between Concrete Walls : Revista Pesquisa Fapesp", "url": "https://revistapesquisa.fapesp.br/en/concrete-walls/" }, { "title": "Serra do Mar", "url": "https://en.wikipedia.org/wiki/Serra_do_Mar" }, { "title": "Serra Do Mar", "url": "https://www.encyclopedia.com/humanities/encyclopedias-almanacs-transcripts-and-maps/serra-do-mar" }, { "title": "(PDF) Serra do Mar: The Most “Tormented” Relief in Brazil", "url": "https://www.researchgate.net/publication/282186805_Serra_do_Mar_The_Most_Tormented_Relief_in_Brazil" }, { "title": "Billings Reservoir", "url": "https://en.wikipedia.org/wiki/Billings_Reservoir" }, { "title": "Guarapiranga", "url": "https://en.wikipedia.org/wiki/Guarapiranga" }, { "title": "Guarapiranga Reservoir location in São Paulo State.", "url": "https://www.researchgate.net/figure/Guarapiranga-Reservoir-location-in-Sao-Paulo-State_fig1_263424567" }, { "title": "Water Resources of Sao Paulo, Brazil", "url": "https://ghaly.union.edu/~ghalya/civil-history/Brazil/Brazil98/Info.htm" }, { "title": "Tamanduate%C3%AD River", "url": "https://en.wikipedia.org/wiki/Tamanduate%C3%AD_River" }, { "title": "Sao Paulo Travel Guide: Introduction", "url": "https://www.latinamericaforless.com/travel-guides/sao-paulo/" }, { "title": "Location of the Billings Reservoir watershed (Taquacetuba branch),...", "url": "https://www.researchgate.net/figure/Location-of-the-Billings-Reservoir-watershed-Taquacetuba-branch-State-of-Sao-Paulo_fig1_228496340" }, { "title": "Yearly & Monthly weather - São Paulo, Brazil", "url": "https://www.weather-atlas.com/en/brazil/sao-paulo-climate" }, { "title": "São Paulo, BR Climate Zone, Monthly Weather Averages and Historical Data", "url": "https://weatherandclimate.com/brazil/sao-paulo" }, { "title": "Sao Paulo Weather by Month", "url": "https://weather-and-climate.com/average-monthly-Rainfall-Temperature-Sunshine,sao-paulo,Brazil" }, { "title": "Climate of Southeast Brazil", "url": "https://en.wikipedia.org/wiki/Climate_of_Southeast_Brazil" }, { "title": "São Paulo Weather Radar & Live Storm & Drought Map", "url": "https://liveearthviewer.com/weather/sao-paulo" }, { "title": "The temperature in the city of São Paulo has risen more than the global average", "url": "https://agencia.fapesp.br/the-temperature-in-the-city-of-sao-paulo-has-risen-more-than-the-global-average/58185" }, { "title": "Assessment of Urban Heat Islands in Brazil based on MODIS remote sensing data - ScienceDirect", "url": "https://www.sciencedirect.com/science/article/abs/pii/S2212095519303554" }, { "title": "Uneven heat exposure in Global South megacities: a comparative analysis of informal settlements in São Paulo and Delhi", "url": "https://link.springer.com/article/10.1007/s10708-026-11716-2" }, { "title": "The potential burden from urbanisation on heat-related mortality in São Paulo, Brazil - ScienceDirect", "url": "https://www.sciencedirect.com/science/article/abs/pii/S2212095524003018" }, { "title": "Extreme rainfall days in metropolitan São Paulo have risen four-fold in the last seven decades", "url": "https://agencia.fapesp.br/extreme-rainfall-days-in-metropolitan-sao-paulo-have-risen-four-fold-in-the-last-seven-decades/32853" }, { "title": "Frontiers", "url": "https://www.frontiersin.org/journals/climate/articles/10.3389/fclim.2020.00003/full" }, { "title": "Sao Paulo Geography and Climate", "url": "https://www.latinamericaforless.com/brazil/travel-guides/sao-paulo-guide-geography-climate.php" }, { "title": "Climate and Weather in Sao Paulo", "url": "https://www.tripreport.com/cities/sao_paulo/climate" }, { "title": "Sao Paulo Climate", "url": "https://newmarketservices.com/international-cities/sao-paulo/sao-paulo-climate/" }, { "title": "Assessment of urban heat island using remote sensing and geospatial application: A case study in Sao Paulo city, Brazil, South America - ScienceDirect", "url": "https://www.sciencedirect.com/science/article/abs/pii/S0895981123005758" }, { "title": "(PDF) Observed and projected changes in rainfall extremes in the Metropolitan Area of São Paulo", "url": "https://www.researchgate.net/publication/260057016_Observed_and_projected_changes_in_rainfall_extremes_in_the_Metropolitan_Area_of_Sao_Paulo" }, { "title": "Extreme rain event highlights the lack of governance to face climate change in the Southeastern coast of Brazil - ScienceDirect", "url": "https://www.sciencedirect.com/science/article/pii/S2666683923000676" }, { "title": "Post Event Report: Extreme Flooding in São Paulo, Brazil", "url": "https://www.guycarp.com/insights/2023/03/Flooding-03-02.html" }, { "title": "Sao Paulo History", "url": "https://www.kupi.com/en-ae/explore/brazil/sao-paulo/history" }, { "title": "P%C3%A1tio do Col%C3%A9gio", "url": "https://en.wikipedia.org/wiki/P%C3%A1tio_do_Col%C3%A9gio" }, { "title": "Santo Andr%C3%A9 da Borda do Campo", "url": "https://en.wikipedia.org/wiki/Santo_Andr%C3%A9_da_Borda_do_Campo" }, { "title": "Timeline of S%C3%A3o Paulo", "url": "https://en.wikipedia.org/wiki/Timeline_of_S%C3%A3o_Paulo" }, { "title": "War of the Emboabas", "url": "https://en.wikipedia.org/wiki/War_of_the_Emboabas" }, { "title": "Brazilian gold rush", "url": "https://en.wikipedia.org/wiki/Brazilian_gold_rush" }, { "title": "Há 300 anos, a vila de São Paulo virava cidade", "url": "https://exame.com/economia/ha-300-anos-a-vila-de-sao-paulo-virava-cidade/" }, { "title": "São Paulo - 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