Wildfire smoke degrades air quality in swaths of Ontario, with Toronto ranking among the worst in the world on Monday.

Smoke from wildfires in Manitoba, a Western province facing its worst fire season in 30 years, has created hazardous air ...

A group of Republican lawmakers has complained that smoke from Canadian wildfires is ruining summer for Americans, just days ...

Canada's wildfires have burned more than 13.6 million acres (5.5 million hectares) this year, an area roughly the size of ...

Canada’s wildfire activity is expected to rise significantly through August, with extreme fire danger in the west. Over 3,000 ...

Smoke from Canadian wildfires again plagued portions of the northern United States on July 16, prompting air quality alerts from Illinois to Maine.

A fire in Northern California’s Shasta County surpassed 10,000 acres over the weekend, prompting a handful of evacuations.

Multiple U.S. states and Canadian provinces are experiencing poor air quality from wildfire smoke. Here's where.

Six members of Congress from Wisconsin and Minnesota have asked Canada to say how it plans to tackle the blazes and reduce ...

World Cup being hosted by Canada, Mexico and the United States is less than a year away and FIFA’s protocols for matches ...

"The reality of it is that I'm in this situation, and I guess I did the best work I could for the position that we’re all in." ...

What’s happening in Canada could be a sign of what’s to come in the United States this year. Experts say it is difficult to tell how severe California’s wildfire season will be after good ...