Multiple U.S. states and Canadian provinces are experiencing poor air quality from wildfire smoke. Here's where.

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 ...

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

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

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 expects particle pollution to reach the Unhealthy for ...

Air quality warnings remain in effect for parts of Saskatchewan and Manitoba as wildfire smoke continues to linger over the ...

There were 118 active wildfires burning across Manitoba as of Thursday, with Saskatchewan reporting 48 active wildfires as ...

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

In Canada, the Air Quality Health Index (AQHI) is a scale developed to help people understand what the current air quality means for your health. It is an initiative among Environment Canada, Health ...