Prolific smoke that’s blown across North America and beyond over the past couple of weeks will bring reduced air quality to southern Ontario through Saturday, with an improvement expected on Sunday. DON’T MISS: Best practices to keep yourself safe from wildfire smoke Significant wildfire activity across the western half of the country has sent plumes of smoke from the Arctic to the tropics—and even across the pond toward Europe.

New York DEC and DOH have issued an Air Quality Health Advisory for fine particulate matter on June 7, 2025, due to wildfire smoke from Canada, and are recommending that people stay indoors to

Smoke from wildfires burning in northern Ontario and the Prairies of Canada caused poor air quality and reduced visibility in major cities including Toronto, Ottawa and Montreal on Friday.