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Toronto moved up a global ranking to have the worst air quality in the world on Wednesday morning. ...

Heat warnings will stretch into Wednesday with a high that feels hotter than 40 C and wildfire smoke across the Greater...

A yellow heat warning has been issued for the Greater Toronto Area and southern Ontario with a high that could feel as...

Scorching temperatures are on the way for southern Ontario this week, with daytime highs climbing into the mid-30s and...