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 ...

Smoke billowing from wildfires is leading to poor air quality and reducing visibility throughout Manitoba this ...

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

Intense wildfires in Canada’s western provinces continued blazing Wednesday, sending smoke southward and triggering air quality alerts throughout the United States. More than 400 wildfires are ...

Air quality warnings are in effect for a large area of Western and Central Canada this weekend as wildfire smoke continues to choke parts of the country. Many communities in Manitoba, as well as ...

Environment Canada says much of the province will be dealing with poor conditions, with Winnipeg expected to see an air ...

Record-breaking wildfires in Canada are impacting air quality in the U.S. The Canadian wildfire season has started early and already broken records, with toxic smoke drifting south to the U.S. and ...

MILES PARKS, HOST: Something like 500 wildfires continue to burn across Canada, and it's affecting the air we breathe. Earlier this week, the air quality in Toronto was among the worst in the world.

Canadian wildfire smoke no longer lingers in Michigan as of July 18. Southwest Michigan will experience unhealthy air for sensitive groups on July 21.

The current infrastructure also isn’t set up to fully account for the shifting behavior of wildfire smoke, which can travel ...