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

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

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

Wildfire smoke from Canada is expected to move over the U.S ... air quality is expected to worsen in parts of Minnesota, where it is forecast to be "unhealthy," AirNow said.

Forecasters warn that hazy, grayish-blue skies could persist for many weeks as fires continue to burn, though most smoke will ...

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.

Smoke is expected to linger over Ohio until at least June 4, according to forecasts. Smoke from wildfires in Canada continues to drift over the United States and has made it harder to breathe in ...

Smoke from wildfires in Canada is making it harder to breathe in Ohio and several other states. Here's how long it will last and what else we know.

Wildfire smoke from Canada is expected to move over the U.S ... air quality is expected to worsen in parts of Minnesota, where it is forecast to be "unhealthy," AirNow 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.

Wind pushed more smoke from Alberta and B.C.’s wildfires to Calgary Wednesday, leading to an air quality warning for the city ...

The National Transportation Safety Board has ruled that wildfire smoke from Canada likely caused a deadly plane crash that ...