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

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

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

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

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

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

Maps show where new plumes of smoke will cause hazy skies through the end of the week. Low-level smoke is forecast to spread ...

The northern Manitoba community of Lynn Lake narrowly avoided calling another mandatory evacuation order this week due to ...

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.

Dry conditions in Canada start a chain of events that exacerbates wildfires, injects plumes of smoke in the air and affects air quality in Milwaukee.

Another large fire exacerbated by climate change is threatening the health of Chicagoans. Government officials issued an air pollution "action day" on Thursday.