Data from the platform indicated Porto Velho (Rondônia) as the city with the most polluted air in the country, at the "very unhealthy" level – the second worst on the scale. Following were Rio Branco, Manaus, Recife, and São Paulo.
Meanwhile, the sky over Brasília was once again covered in smoke caused by forest fires. This situation has occurred since Sunday morning when the haze obscured the horizon in the federal capital.