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 ...

An air quality alert is in effect for parts of northern Minnesota as wildfire smoke from fires burning in Canada again drifts ...

Much of Central Canada, Manitoba and Saskatchewan were placed under special air quality statements or warnings on Monday due ...

A group of Republican lawmakers has complained that smoke from Canadian wildfires is ruining summer for Americans, just days ...

Wildfire smoke has been blowing into the city since Sunday though residents should should expect some relief by early morning ...

World Cup being hosted by Canada, Mexico and the United States is less than a year away and FIFA’s protocols for matches ...

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

(The Center Square) – Wisconsin’s northernmost congressman is fed up with smoke and haze from Canada. Congressman Tom Tiffany ...

Additional plumes of smoke from Canada's active wildfires prompt officials to issue a statewide air quality alert on July 14.

Major fires continue to burn in Arizona and across Canada, impacting the air quality for millions of people. An air purifier can help, but it depends on the filter.