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

Smoke from wildfires in Manitoba, a Western province facing its worst fire season in 30 years, has created hazardous air ...

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

EDT the National Weather Service reported an air quality alert in effect until Monday at noon EDT for Midland, Bay, Huron, ...

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

The Michigan Department of Environment, Great Lakes, and Energy issued southeast Michigan's sixth air quality advisory of the ...

An air quality alert for northwest Minnesota has been extended to cover the entire state and run through Monday.

The National Weather Service reported an air quality alert at 11:54 a.m. EDT on Sunday in effect until Tuesday at midnight ...

The Canadian wildfires are expected to track east and south, expanding in Michigan as Sunday goes on and additional smoke is ...

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

The alert will reach the orange air quality level, indicating that sensitive groups should limit time outdoors.

The weather agency has issued a special air quality statement for much of Manitoba, noting that air quality and visibility due to wildfire smoke can fluctuate over short distances.