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Dry weather and a layer of pollution cover the sky in Sao Paulo, Brazil, on Tuesday, due to fires in the state. Brazil expects days of extreme heat due to the arrival of a heat wave. Dry air continues to predominate in the coming days, keeping temperatures above average with low humidity, especially in the afternoons. Under these conditions, pollutants have difficulty dispersing, impacting air quality. Additionally, low humidity favors the spread of fires and forest fires. (Photo by Fabio Vieira/FotoRua/NurPhoto via Getty Images)

Dry weather and a layer of pollution cover the sky in Sao Paulo, Brazil, on Tuesday, due to fires in the state. Brazil expects days of extreme heat due to the arrival of a heat wave. Dry air continues to predominate in the coming days, keeping temperatures above average with low humidity, especially in the afternoons. Under these conditions, pollutants have difficulty dispersing, impacting air quality. Additionally, low humidity favors the spread of fires and forest fires. (Photo by Fabio Vieira/FotoRua/NurPhoto via Getty Images)