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 ...

Summer heat will return to the Twin Cities on Monday as air quality concerns linger for parts of Minnesota. The week will ...

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

The air quality is poor today in northern Illinois due to migrating Canadian wildfire smoke. See the AQI in your area.

Sensitive groups are advised to stay indoors and limit outdoor activities as pollution and ozone levels spike to unhealthy ...

In the UK, considerable efforts have been made to improve air quality. Its importance has been enshrined in law for nearly 70 ...

EDT on Tuesday, the National Weather Service reported an air quality alert in effect until Thursday at midnight EDT for ...

Air pollution levels over Redding and parts of Shasta County are close to hazardous levels at times, due to heavy Green Fire ...

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

COLUMBUS, Ohio — Columbus is under an Air Quality Alert Tuesday due to elevated ozone levels. Mid-Ohio Regional Planning ...