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 ...

Environment Canada is warning of poor air quality and extreme heat in Toronto on Monday as southern Ontario braces for a week ...

Environment Canada warned on Thursday that poor air quality in the Toronto area would likely last into Friday. “Wildfire smoke can be harmful to everyone’s health even at low concentrations ...

Environment Canada urges residents to limit their time outdoors. But even when inside, most buildings can only reduce ...

Poor air quality may persist in some areas of Toronto on Thursday and Friday due to forest fire smoke, Environment Canada says. The federal weather agency issued a special weather statement for ...

Much of Central Canada, Manitoba and Saskatchewan were placed under special air quality statements or warnings on Monday due ...

Environment Canada issued a special air quality statement for Toronto Tuesday afternoon, advising that high levels of air pollution will develop in the evening due to smoke from forest fires.

Toronto and the GTA are under a heat wave and poor air quality warning issued by Environment Canada on July 14, 2025, due to ...

Earlier this week the air quality in Toronto was assessed to be among the worst in the world, ... Weather A big swath of the U.S. is under red and purple air quality alerts from Canada's smoke.

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.

More than 100 million people are under air quality alerts Friday morning from Wisconsin to Vermont and down to North Carolina as smoke from Canadian wildfires continues to waft south, though ...