Toronto air quality expected to improve Friday after two days of hazardous smoke

After two consecutive days of hazardous air quality, Toronto's skies should begin to clear Thursday night, with a more noticeable improvement expected Friday morning, according to Environment Canada.

The Air Quality Health Index reached 10 Thursday morning — the highest risk category — as wildfire smoke from northern Ontario blanketed the city. Conditions are forecast to improve Thursday night to around 8, then drop to approximately 6 by Friday morning, placing the region in the moderate-risk category for those spending time outdoors. An AQHI reading between 4 and 6 is considered moderate risk.

But the relief may be temporary. Environment Canada forecasts the AQHI could climb back to around 8 by Friday night as smoke continues to drift south. Nearly 200 wildfires remain active across northern Ontario, with persistent northwesterly winds continuing to push smoke into southern regions.

Residents are encouraged to check the latest air quality updates before spending extended periods outdoors, as forecasts may shift depending on wildfire activity and wind patterns. Evacuation orders remain in effect for several communities across the north, while firefighters, helicopters, and water bombers continue containment efforts.