Canadian wildfire smoke turns air hazardous in the U.S. Midwest

Heavy, pungent smoke from Canadian wildfires darkened skies in the U.S. on Thursday from the Great Lakes to parts of the East Coast, reducing visibility for commuters and prompting warnings that air quality could make being outside dangerous.

Heavy, pungent smoke from Canadian wildfires darkened skies in the U.S. on Thursday from the Great Lakes to parts of the East Coast, reducing visibility for commuters and prompting warnings that air quality could make being outside dangerous.

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Detroit’s air quality was among the worst in the world for major cities, as a lingering high pressure system trapped smoke from dozens of fires in Canada and northern Minnesota, said Steven Freitag, a National Weather Service meteorologist in Pontiac, Michigan.

“Sure enough, it arrived in force here and it’s really pretty extreme levels,” said Freitag, who noted that visibility in some areas was reduced to a half mile.