Republican lawmakers are blaming Canada for not preventing and containing wildfires, whose smoke has fouled the air in ...

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

Smoke from wildfires blazing across Canada is once again wafting over huge portions of the U.S. Midwest and worsening air ...

The Midwest saw some of the worst air quality conditions in the world Thursday, and similar conditions are expected to persist for several days.

Heavy surface smoke from wildfires in Canada is drifting across Minnesota on Monday, with unhealthy air quality levels ...

Minnesota and Canada share so much: frigid winters, a love for hockey — and more recently, massive plumes of toxic wildfire ...

Because of all of the smoke, the Pennsylvania Department of Environmental Protection has declared a Code Orange Air Quality ...

Smoke from Canadian wildfires hovered over several Midwestern states Saturday, bringing warnings of unhealthy air ...

With hundreds of wildfires burning across Canada, smoke has drifted into the northern United States, lowering air quality ...

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

Wildfire smoke from Canada and the West Coast is impacting air quality across the U.S., including right here in Virginia.

The scale and intensity of the fires have had transboundary effects. Smoke from the blazes has drifted across the border into ...