Wildfire smoke from Canada is blanketing the skies in the Midwest, leaving millions with dangerous breathing conditions.

Chicago was listed as the worst air quality in the world for part of Aug. 1 because of smoke from the fires blowing southeast ...

Chicago air quality remains in the top five worst in the world Friday with an Air Quality Alert in place from Canadian ...

CHICAGO (WLS) -- Most of the Chicago area remains under an Air Quality Alert on Saturday due to smoke from Canadian wildfires ...

CHICAGO (WLS) -- Air Quality Alerts remain in effect for the Chicago area Friday due to smoke from Canadian wildfires.

Chicago air quality remains in the top five worst in the world Friday with an Air Quality Alert in place from Canadian wildfire smoke.

For a period of time this week, Chicago's air quality ranked as the worst air quality on planet earth. This was caused by smoke billowing south from ...

Smoke has continued to cloud Illinois' air for a second straight day, but the poor air quality isn't because of a fire in the ...

A thick haze of smoke from Canadian wildfires has descended on the US Midwest, degrading air quality during Lollapalooza in Chicago.

It appeared that, as of Friday, Chicago-area residents wouldn't get a reprieve from poor air quality in the near future.

Chicago faces health concerns due to smoke from Canadian wildfires, leading to an "unhealthy" air quality alert.