Smoke from Canadian wildfires is causing air quality concerns for millions of Americans in the Midwest and Northeast.

Parts of the Midwest and Northeast are experiencing poor air quality Monday as smoke from Canadian wildfires drifts into the ...

When combined with the Philly area’s warm, sunny weather, the incoming smoke stands to increase levels of ozone, the ...

Canadian wildfire smoke has affected Wisconsin all week, prompting multiple air quality alert extensions from the DNR.

An air quality alert is in effect for all of Massachusetts today due to smoke from Canadian wildfires, and it could be the ...

Syracuse, N.Y. -- Upstate New Yorkers could inhale unhealthy air for days, New York state officials warned today. “We expect ...

Smoke from Canadian wildfires will move into the region Monday, Aug. 4, causing unhealthy air for sensitive groups.

Wildfires burning in Canada were causing unhealthy air quality across parts of North America on Monday. Canadian wildfires ...

Smoke from ongoing Canadian wildfires has led to some of the worst air quality in the world across parts of the U.S.

A 'code orange' exists when the air quality index is greater than 100. As of the early afternoon, much of the area remained in the elevated ''yellow" range, according to the U.S. Environmental ...

The National Weather Service reported an air quality alert at 1:20 p.m. EDT on Monday in effect until Wednesday at midnight ...

Northeast Ohio’s stretch of pleasant summer weather continues to start the week, but Canadian wildfire smoke has pushed air quality into the “unhealthy for sensitive groups” range on Monday.