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 ...

When air quality is ranked "unhealthy for vulnerable groups" it means PM 2.5 are at levels that can cause problems for people ...

Residents in lower-income areas, often near highways and industrial sites, still breathe some of the dirtiest air in the ...

With smoke drifting over the Sacramento region from wildfires in the north state, air quality officials are urging capital ...

The advisory was extended on Friday afternoon, with officials warning that air quality could be affected through Saturday.

I lost my home in the Pacific Palisades fire. Although wildfires have become a part of modern life, you can take steps to ...

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

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

Officials warn southeast Michigan residents to be careful outdoors Tuesday because of expected high ozone pollution levels.

An air quality alert was in effect for the Chicago area and northwest Indiana Tuesday as poor air quality from unhealthy, ...

The current infrastructure also isn’t set up to fully account for the shifting behavior of wildfire smoke, which can travel ...