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

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

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

When Bill Clinton arrived in Mont-Tremblant, Canada, in October 1999 for a governance conference, the United States’ northern neighbor was still reeling from attempts by its largest province ...