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

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

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

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

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

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

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 ...

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

Firefighters across the Final Frontier are working to contain dozens of blazes that have forced evacuations and occasionally ...

Canada still has time to lead — not just in firefighting, but in foresight. To invest in our forests, respect our waters, ...

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.