PHOTOS: Midwest Choked By Canada Wildfire Smoke

P​hotos show the Chicago skyline as well as Michigan's Mackinac Bridge obscured by smoke as Canada's wildfires caused poor air quality and low visibility in the Midwest Tuesday.

C​hicago's air quality was rated "unhealthy" Tuesday, and IQAir live rated the city's air quality as the worst worldwide for any major city that day. Minneapolis and Detroit also had unusually poor air quality Tuesday.

(​MORE: Wildfire Smoke Fills Chicago Skyline As Air Quality Plunges)

Air quality alerts are in effect for Wisconsin and Indiana, however Illinois did not make that list, ABC7 Chicago reported.

P​eople in affected areas could smell the smoke, and the visibility in Wheeling, Illinois, was measured to be at only .25 miles early Tuesday, and 1.5 miles at Midway International Airport, according to NBC 5.

Canada is experiencing the worst year for wildfires on record, and fires throughout Quebec province have been burning for weeks. In early June, the fires sent smoke southward into the Northeastern U.S., painting skies orange and yellow and creating unhealthy, very unhealthy and even hazardous air quality.

C​lick through the slideshow above to see images of the Midwest shrouded in smoke and haze.

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