Wildfire smoke degrades air quality in swaths of Ontario, with Toronto ranking among the worst in the world on Monday.

EDT on Tuesday, the National Weather Service reported an air quality alert in effect until Thursday at midnight EDT for ...

CLEVELAND, Ohio — Dry and warm weather will peak Tuesday in Northeast Ohio, ahead of rain and thunderstorm chances midweek.

The Chicago area recorded ozone levels of 156 late Monday afternoon. Levels above 100 are considered unhealthy. Residents ...

An Air Quality Alert will be in effect through midnight Tuesday for Southeast Michigan, the state's Department of Environment ...

The National Weather Service reported an air quality alert at 12:35 p.m. EDT on Monday in effect until Wednesday at midnight ...

Summer heat will return to the Twin Cities on Monday as air quality concerns linger for parts of Minnesota. The week will ...

At 9:57 a.m. on Monday, the National Weather Service reported an air quality alert in effect until 10 p.m. for Oneida, Seneca ...

Crews are battling the Max Fire, which has burned 426 acres in Fresno County with 5% containment as of 5:00 p.m. Monday.

Additional plumes of smoke from Canada's active wildfires prompt officials to issue a statewide air quality alert on July 14.

On Monday at 10:07 a.m. an air quality alert was reported by the National Weather Service in effect until Tuesday at midnight ...

The air quality is poor today in northern Illinois due to migrating Canadian wildfire smoke. See the AQI in your area.