the development achieved, still has part of its population living precariously, in slums scattered throughout the city. The literacy rate is high: 99.6%. Main nationalities of origin of immigrants living in São Caetano: Italian, Spanish, Arabic, African, Japanese, Portuguese, German, Ukrainian, Lithuanian and Hungarian. Climate According to the Köppen climate classification São Caetano do Sul has a humid subtropical climate. Little hot and rainy summer. Winter mild and subservient. The average annual temperature is around 18 °C, the coldest month in July (average of 15 °C) and the warmest in February (average of 21 °C). The annual rainfall index is around 1 360 mm. Economy São Caetano do Sul belongs to the region of ABC Paulista, which was marked by industrial and automobile development. Some examples are the industries located on the border with São Paulo, and the General Motors headquarters in Brazil, on Goiás Avenue, the main financial center of the city. Nowadays, in the avenue, dams and branches of several companies are installed. People from various regions of the metropolis go to the city on the job, coming mainly from the region of ABC itself and from the districts of the south and east of São Paulo that border the city. Commerce is also a strong economic target for the city, which houses the headquarters of the Casas Bahia store chain, founded in 1952 by the Jewish immigrant Samuel Klein. With the real estate growth in the region, a number of developments were created, among them Moov Espaço Cerâmica, which contributed to the generation of jobs in the city's civil construction. Standard of living São Caetano do Sul boasts the highest social indicators anywhere in the country (even if using indexes such as those that compute the HDI formula). Illiteracy rates are very low and most people enjoy a safe city with well-maintained infrastructure. São Caetano has no favelas, with the closest one bordering Heliópolis, São Paulo's largest favela, next to a large Petrobras oil distribution and storage facility in nearby Ipiranga. Such border areas between São Caetano and adjacent cities São Bernardo do Campo and Santo André are prone to flooding which happens often, especially in the more impoverished areas bordering the city of São Paulo, where the Meninos creek (a tributary of the heavily polluted Tamanduateí river) is often littered with construction debris and garbage, exacerbating the flooding effect in the rainy season (Oct–Feb). The city