Smoke from ongoing Canadian wildfires has led to some of the worst air quality in the world across parts of the U.S.

Canada is experiencing a terrible wildfire season with nearly 4,000 wildfires so far this year, close to a record pace.

However, Lake, Porter, Newton and Jasper counties in Indiana will be under another air quality alert all day Tuesday. The ...

An air quality advisory is in effect for New York City on Monday due to wildfire smoke from Canada, according to officials. Other areas that are affected by the advisory include ...

More than 739 fires are burning in Canada, and smoke crossing the border has triggered air quality alerts in several U.S.

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

New York and other neighboring states are under an air-quality advisory due to influx of smoke from ongoing wildfires in ...

Close Your Windows, the Wildfire Smoke Is Back New York and other neighboring states are under an air-quality advisory due to ...

Air quality in parts of Michigan, Wisconsin, New York and Ohio was in the "unhealthy" category on Monday morning ...

PITTSBURGH — There will be sun and clouds this afternoon, with temperatures rising near average to the low to mid-80s.

Close the windows and turn on the air conditioner, if you have one, setting it to circulate the indoor air. Use blankets to ...

Coughing, sneezing, runny nose. Sure, those are signs of seasonal allergies, but they can also be caused by wildfire smoke.