PM2.5 — is expected to push the Air Quality Index over 100, reaching levels unhealthy for sensitive groups, including ...

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

Wildfires burning in Canada were causing unhealthy air quality across parts of North America on Monday. Canadian wildfires ...

Degraded and/or unsafe air quality levels will continue across parts of Canada Monday as wildfire smoke lingers. However, the ...

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

Millions from the Great Lakes to the Northeast are under air quality alerts – with the toxic smoke prompting a ground delay ...

An air quality alert is in effect for all of Massachusetts as smoke from Canadian wildfires descends into the Boston area.

Tuesday night is when the high pressure system shifts to the east, the NWS says. This should allow south winds to return, ...

Canadian wildfire smoke has affected Wisconsin all week, prompting multiple air quality alert extensions from the DNR.

Detroit currently is ranked third worst worldwide for major city air quality today, Aug. 4, because of smoke from Canadian ...

Forecasters say weak winds have left Canadian wildfire smoke to linger over the U.S. Stronger winds are expected to bring relief later in the week.

The worst air quality in recent years occurred in June 2023, when the smoke became so thick it created an orange haze over ...