This stunning NASA map tracks our summer of wildfire smoke

Hundreds of fires have burned in Canada and the northwestern U.S. This visualization shows exactly how far the pollution travels.

Welcome to the new normal: When the sky in New York City or Detroit turns a sickly shade of orange, your first thought might be to wonder what part of Canada is burning now. 2026 is the fourth consecutive year that smoke from Canadian fires has caused severe air pollution in cities hundreds or even thousands of miles away.

A NASA visualization tracks how wildfire smoke traveled from........

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