Steven Freitag

Canadian wildfire smoke caused hazardous air quality across the U.S. Midwest and Great Lakes regions, with visibility reduced to half a mile in some areas. Officials warned of health risks from microscopic particles in the smoke, which could persist for weeks or months as fires continue.

Canadian wildfire smoke caused hazardous air quality in the U.S. Midwest and parts of the East Coast, reducing visibility and prompting health warnings. Detroit's air quality ranked among the worst globally, with officials urging residents to stay indoors and limiting outdoor activities in cities like New York.

Canadian wildfire smoke caused hazardous air quality in the U.S. Midwest and parts of the East Coast, prompting officials to urge people to stay indoors. Detroit's air quality was among the worst globally, with reduced visibility and health advisories for vulnerable groups. New York City distributed face masks and adjusted public activities as thick smoke obscured the skyline.