Toronto choked by wildfire smoke from Canadian forests

Toronto, the capital of Ontario, is ranked the second most polluted city globally due to wildfire smoke from northwestern Ontario.

Published 6sem3 sources✓ ConfirmedNotableupdated 6sem

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Authorities issued health alerts and recommended limiting outdoor activities.

The smoke also affects air quality in the eastern United States.

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Auto-synthesis from 3 media sources · identified on July 16, 2026