Intense wildfires across Brazil, particularly in the Amazon, have resulted in significant smoke pollution affecting major cities like São Paulo and Rio de Janeiro, as well as neighboring countries such as Argentina and Uruguay. Karla Longo from the National Institute for Space Research estimates that smoke has impacted around 60% of Brazil's territory, with the total affected area reaching up to ten million square kilometers. Sao Paulo, now the world’s most polluted city, has reported PM2.5 levels 14 times higher than WHO recommendations. The fires, largely attributed to human activity and exacerbated by a historic drought, have led to a surge in respiratory health issues among residents. The situation is being closely monitored, as satellite images reveal extensive smoke coverage across South America, marking the worst fire season since 2010. Authorities are urging measures to mitigate health risks while addressing the ongoing environmental crisis.