[HIGHLIGHTS] The sun still does not appear in a Washington covered by the smoke of the fires of Canada

Pollution has improved slightly in New York, which on Wednesday was the hardest-hit region. The city of Philadelphia — roughly between New York and Washington — is in the worst condition.

About 50 million people in the U.S. and Canada live in regions with unhealthy or outright hazardous air due to fires. It is possible that next week the situation will improve, as the westerly wind carries pollution to the Atlantic Ocean, away from major American cities. The environmental catastrophe will still be there, although far from the eyes - and noses and throats - of citizens and media reports.