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

The hazy air hovering over US cities, including Chicago and New York, this summer is reminding Americans of just how ...

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

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

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

But a growing body of research is reinforcing the knowledge that wildfire smoke is much more than an inconvenience — in fact, ...

Air quality remains poor in parts of Canada as wildfire smoke travels along the jet stream — with Europe now in its path.

House Republicans Elise Stefanik and Nick Langworthy questioned Canada's commitment to wildfire prevention in a letter to Prime Minister Mark Carney.

Air quality alerts are in effect in the Philadelphia area, fueled by smoke from wildfires that are burning thousands of miles ...

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

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

As Canada’s wildfire smoke creeps down into the U.S., it’s also transforming. Chemical reactions between gases and sunlight create ozone, which further exacerbates lung conditions like asthma.