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 ...

Smoke billowing from wildfires is leading to poor air quality and reducing visibility throughout Manitoba this ...

Minnesota experts say Canadian wildfires will lead to more poor air quality days across Minnesota this summer, and into the future as temperatures and drought increase.

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

Intense wildfires in Canada’s western provinces continued blazing Wednesday, sending smoke southward and triggering air quality alerts throughout the United States. More than 400 wildfires are ...

Wildfires in Canada are continuing to blanket its southern neighbors in smog, triggering new air quality alerts in the northern high plains, Midwest and Great Lakes, according to the National ...

Cook County is under a heat watch through Thursday evening. Temperatures could feel like 105-110 degrees Wednesday.

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

Wildfires burning in Canada continue to create hazardous air quality conditions in several states in the northern U.S. Plumes of smoke from the fires blazing in Halifax, Nova Scotia, began ...