This stunning NASA map tracks our summer of wildfire smoke

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 hundreds of fires in North America from mid-July to early August, showing the sprawling size of the impact....