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

The Department of Natural Resources and Environmental Control warns of air that is unsafe for sensitive groups on July 5.

There is an air quality advisory for Saturday due to wildfire smoke in parts of Ontario. Environment Canada says wildfire ...

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

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

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

Canada's environment ministers back tougher air quality standards, citing wildfire smoke and rising health risks from fine ...

The Michigan Department of Environment, Great Lakes, and Energy has declared an air quality alert for Friday. There are ...

The U.S. has one of the world’s most advanced systems to monitor air pollutants. Can it keep up with a changing climate?

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 ...

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 ...