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

Smoke from wildfires in Canada brought record-breaking air pollution to the United States this spring, creating dangerous air quality from Bismarck, N.D., to Denver and Detroit to New York City ...

In Washington, at least six wildfires were burning; two of the blazes near Spokane covered more than 10,000 acres each. Smoke from fires in British Columbia across the Canadian border also ...

Wildfire smoke from Canada is expected to move over the U.S., impacting air quality for millions of people on Friday and this weekend. Maps and satellite imagery show the large-scale impact of the ...

Wildfire smoke from Canada is expected to move over the U.S., and maps and satellite imagery show the large-scale impact of the blazes.