An air quality map shows conditions improving in the U.S. on Friday as smoke from the Canadian wildfires subsides.

Continued drifting of wildfire smoke from Canada and Alaska has prompted Bay Area air regulators to extend an air quality ...

The ongoing Canadian wildfires have reportedly blanketed a third of the United States, affecting millions, with the National ...

Many fires burning across Canada, forcing evacuations and threatening air quality in the United States, cannot simply be put out, authorities and experts say.

Smoke from the Canadian wildfires continues to bring potentially dangerous air quality to parts of the northern U.S., with ...

Maps show where new plumes of smoke will cause hazy skies through the end of the week. Low-level smoke is forecast to spread eastward Wednesday across the Appalachians and into the Mid-Atlantic and ...

Hamilton, Burlington, Niagara and surrounding areas are seeing smoke from wildfires in Western Canada impact air quality and that is expected to continue until Friday evening, Environment Canada said.

The 2023 wildfires released nearly one gigatonne — or one billion tonnes — of carbon dioxide from Canada’s forests, an amount ...

Toronto was the fourth most polluted major city in the world on Friday night as wildfire smoke hung over the city, according to a global tracker.

Many Toronto commuters masked up on Friday as wildfire smoke from Western Canada rolled into the city. Residents of Ottawa and Montreal, too, woke up to air-quality warnings.

Smoke from Canadian wildfires is engulfing much of the eastern and central United States and and is expected to continue for days.

Much of southern Ontario was under an air quality statement on Thursday and Friday that lifted early Saturday morning.