“Air quality and visibility due to wildfire smoke can fluctuate over short distances and can vary considerably from hour to ...

Smoke from Canadian wildfires prompted a special air‑quality statement for Toronto and warnings nationwide, urging residents to limit outdoor time amid poor air and hazy skies.

Blazes across several Canadian provinces and territories pose health risks to Canadians and their southern neighbours.

Environment Canada has issued special air quality statements for multiple regions across northeastern Ontario and beyond.

A Greenwood and Danforth measuring station reported the city’s worst air quality Saturday evening. Smoky skies are likely ...

Wildfire smoke from the Prairies has prompted a special air-quality statement over much of northern Ontario Saturday.

Wildfire smoke from the Prairies prompted special air quality statements and warnings across the country Saturday.

Environment Canada has issued special air quality statements for multiple regions across northeastern Ontario and beyond.

It’s going to be a hazy and humid Sunday across southern Ontario, with wildfire smoke reducing visibility and triggering special air-quality warnings as temperatures climb toward 30 C. Those hoping to ...

Toronto is among the most polluted cities in the world on Sunday morning as much of Ontario remains under an air quality ...

The Canadian government’s map of wildfire smoke fine particulate matter models for Aug. 2-3 shows smoke will intensify over ...