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

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

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 ...

Unhealthy air has invaded Minnesota, Wisconsin and North Dakota early this week as a new round of wildfire smoke from Canada ...

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 ...

Millions of Americans are under air quality alerts as wildfires burn in Canada. Experts say the weather pattern could change by early next week, and stress the need to take precautions until then.

With various air quality indexes available, and as wildfire smoke becomes an increasing health risk, here’s what often goes ...

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

Canadian wildfire smoke lingers in Michigan. Officials issued an air quality advisory in southeast Michigan for July 15.

The 'unhealthy for sensitive groups' air quality in Chicago comes as an air quality alert was issued for the entire state of ...