Smoke from hundreds of wildfires in Canada is lingering over the northern U.S., spreading across to roughly a dozen states ...

Hundreds of wildfires still burning in Canada are expected to undermine air quality across the Upper Midwest and Northeast ...

With hundreds of wildfires burning across Canada, smoke has drifted into the northern United States, lowering air quality ...

Millions of people across the Upper Midwest and the Northeast are under air quality alerts Monday, as smoke from wildfires in ...

This is the second most severe fire season on record in Canada, according to the National Interagency Fire Center.

While alerts have been downgraded from 'unhealthy for sensitive groups' to 'moderate,' the air quality could still be a ...

Viewers shared snapshots of hazy skies as Canadian wildfire smoke continues to impact air quality in parts of Maine.

This is why even without the presence of smoke, many sunrises and sunsets appear yellow or orange. Smoke particles in the sky ...

PORTLAND (WGME) -- Sunshine, seasonable temperatures, and low humidity levels are all on tap for Wednesday in Maine. Wildfire smoke is beginning to thin out as well over eastern New England. The smoke ...

Millions of Americans across the Midwest, Northeast and swathes of the South and Southwest are under air quality alerts Monday. Newsweek's live blog is closed.

Maine's air quality continues to suffer from lingering Canadian wildfire smoke, so we asked a health expert why exposure to ...

Smoke from hundreds of wildfires in Canada is lingering over the northern U.S., spreading across to roughly a dozen states from Wisconsin to Maine.