Smoke from Amazonian and Pantanal fires darken Brazil's Midwest and Southeast cities; São 16h (It's 4pm) becomes a trend on Twitter in Brazil

The city of Sao Paulo has become an apocalyptic movie set today. The CGE (São Paulo City Hall's Climate Emergency Management Center) explanation for the darkness is related to the weather and the burning that take place in the country. The Civil Defense has warned of heavy rain in some parts of the metropolitan region of the city and winds that have brought particulate matter originating from burning in Paraguay, on the border with Mato Grosso do Sul, and other regions in Brazil, turn the sky black.

The unusual darkness of the sky in the middle of the day frightened residents of São Paulo and other large cities in southeastern Brazil.

The subject took over social networks in Brazil. On Twitter, the "São 16h" trend has produced thousands of comments and photo posts from the completely dark sky in the middle of the day in São Paulo and other cities.