Smoke from Canadian wildfires is smothering U.S. cities like Detroit, Chicago and Pittsburgh. Air quality warnings are in effect across the Midwest as officials warn of hazardous conditions.

Three U.S. cities ranked among the top 10 for worst air quality in the world Tuesday morning as smoke from Canada fires hit Chicago and the Midwest.

Detroit had some of the worst air quality among major cities across the world Wednesday morning, according to IQAir's air quality index, thanks to the wildfire smoke drifting south from Canada ...

Canada wildfire smoke threatens Michigan air quality — again Gather 'round the fire pit tonight? Bad idea, as Canada's wildfires burn largely out of control, bringing hazardous smoke to Michigan.

The Detroit area reached a daily AQI of 184, the second highest on record, behind 190 in December 2006. ... Canada wildfire smoke is drifting from the Midwest to the East Coast.

Unhealthy air returned to metro Detroit on Friday afternoon, June 6, as smoke from Canadian wildfires continued to drift into Michigan. An air quality advisory is in effect across southeast ...

Canada's 1.4 million square miles of forest is 15 times the surface area of all of the Great Lakes combined. Smoke from Canadian wildfires lingers in downtown Detroit skyline off of Woodward Avenue on ...

Smoke from wildfires still raging in Canada is degrading air quality across the northern U.S., turning skies a murky orange hue and forcing sensitive groups indoors.

Canada has a wildfire problem — research shows its wildfires are growing in intensity and area burned.Last year, it reached nightmarish proportions — and became America's problem, too. Canada ...

Canada wildfires force 17,000 to evacuate, with smoke blowing toward US ... Chicago and Detroit all potentially seeing a reduction in air quality and/or visibility in the afternoon and evening. ...

A wildfire emergency in western Canada has spread to another province as thousands ... By Friday, it is expected to reach the cities of Minneapolis, Minnesota; Detroit, Michigan; Green Bay, Wisconsin; ...