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 ...

Tuesday’s air quality warning has dropped to a 5, considered a moderate risk, down from Monday’s peak of 10+ on the Air ...

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Parts of the Greater Toronto Area remained under a special air quality statement and a heat warning on Monday night.

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

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

Environment Canada has placed Toronto, and the surrounding GTA, under both a heat wave and a poor air quality warning due to wildfire smoke.

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

With various air quality indexes available, and as wildfire smoke becomes an increasing health risk, here’s what often goes ...

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