Dense wildfire smoke set to impact Ontario by Wednesday
Widespread air quality warnings are in place across Ontario, caused by out-of-control wildfires in the northwestern part of the province. Watch the surface smoke forecast to see how conditions are expected to worsen into Wednesday.
Dense wildfire smoke is forecast to reach Ontario midweek as hundreds of active wildfires in northern Ontario continue to produce significant smoke plumes.
Yellow-coloured air quality warnings are in place for southern Ontario, including the Greater Toronto Area (GTA), and parts of Quebec.
DON'T MISS: The Weather Network's hub for all wildfire information in Canada
Evacuation orders remain in place for Armstrong and Whitesand due to advancing wildfires.
A strong jet stream is transporting the smoke southeast, with southern Ontario expected to experience degraded air quality starting Wednesday and lingering into Thursday.
Smoke may become concentrated at the surface, heightening health risks for those with respiratory conditions.
RELATED: Wildfires prompt multiple evacuations in northwestern Ontario amid extreme heat
Residents can expect hazy skies, red sunrises and sunsets, and potential odours of wildfire smoke. Those sensitive to poor air quality are advised to limit outdoor activities as conditions evolve.
Stay updated on updated air quality alertsfor this week.
Smoky skies observed in Cornwall, Ont., on July 14, 2026. (The Weather Network)