As Canada grapples with one of its worst wildfire seasons on record, smoke from the blazes have prompted air quality alerts across the U.S.

Air quality alerts are in effect on Tuesday in 10 states as toxic smoke from hundreds of wildfires burning in Canada ...

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

Air quality alerts have been issued across 12 states for Wednesday, according to the National Weather Service.

Air quality in states north of Tennessee has been reduced by smoke from Canadian wildfires, but how will those wildfires ...

The air quality index on Tuesday across the Midwest and the Northeast ranged from "moderate" to "unhealthy" for sensitive adults. Some areas in northern Wisconsin, eastern Pennsylvania, northern ...

Canada is battling more than 700 active wildfires across the country, roughly two-thirds of which are burning out of control, ...