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

Wildfire smoke from Manitoba, Canada, will blow across two dozen states through Saturday, reducing air quality and creating hazy skies.

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

Wildfires are already burning in parts of Canada, and as they do, many communities are already facing the familiar thick haze ...

Smoke from wildfires in Canada has spread more than 5,000 miles, reaching parts of Russia and Europe during the past week.

Wildfires scorching several Canadian provinces have driven at least 33,400 people from their homes, with smoke now reaching all the way to Europe.

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

Smoke poured over the Canadian border into eastern Alaska this weekend, bringing poor air quality to communities from ...

Some leave on their own. But there are others who choose to stay, including many farmers who do not want to surrender their ...

Massive wildfires burning out of control in western and central Canada are forcing thousands to flee. The blazes are also sending hazardous smoke toward major cities in the United States.

Health specialists were put on leave, and a report on how to protect 20 million workers from wildfire smoke has stalled ...

More than 200 wildfires are raging across Canada, sending a thick blanket of choking smoke through the U.S. Midwest. Experts says climate change means U.S. residents better get used to it.