Canadian wildfire smoke is billowing south across the U.S. border, shrouding much of the Upper Midwest and Northern Tier and degrading air quality to hazardous levels. Air-quality alerts cover the ...

The Midwest and Northeast will continue to see reinforcing shots of cold every few days, so don’t expect to see any relief from the cold anytime soon. The coldest air will be felt across the Northern ...

Add Yahoo as a preferred source to see more of our stories on Google. Air Quality Index Map for Aug. 6. (Airnow.gov) Smoke from ongoing wildfires across Canada continued to drift into parts of the ...

MINNEAPOLIS — Smoke from Canadian wildfires carried another day of poor air quality south of the border to the Midwest, where conditions in parts of Minnesota, Wisconsin and Michigan were rated “very ...

What may be the most substantial cool air outbreak since last spring is expected to sweep across the Midwest through Sunday. A significant push of cool air from central Canada is forecast to reach the ...

Wildfires burning in western Canada are triggering poor air quality warnings in the upper Midwest, advising people with heart or lung disease, older adults and pregnant people to limit outdoor ...