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 ...

Smoke from wildfires still raging in Canada is degrading air quality across the northern U.S., turning skies a murky orange ...

A gray haze from wildfire smoke could be seen in Cincinnati, and the entire state of Minnesota is under an air quality alert.

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

The Bay Area Air District on Sunday morning issued an air quality advisory due to possible wildfire smoke from Canada and ...

The Bay Area Air District on yesterday morning issued an air quality advisory due to possible wildfire smoke from Canada and ...

The Bay Area Air District on Sunday morning issued an air quality advisory due to possible wildfire smoke from Canada and ...

Recent, out-of-control wildfires in Canada are bringing hazy, dangerous air to American communities, prompting air quality alerts and advisories in multiple states nationwide. With the size and number ...

The Trump administration's proposed EPA budget cuts and staff reductions threaten the agency’s capacity to monitor and ...