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.

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

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

Canada had some of the worst air quality in North America on Tuesday morning according to waqi.info, the website for the ...

The Minnesota Pollution Control Agency has issued an air quality alert for north central and northeast Minnesota. The alert ...

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 ...

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 Department of Environmental Protection issued an air quality alert for Maine. Unhealthy for Sensitive Groups levels of ...

The Maine Department of Environmental Protection has issued an Air Quality Alert for Northern Maine Tuesday due to elevated ...

An air quality alert in the Chicago area will stretch into a third day as pollutants continue to linger in the air at high ...