As wildfires continue to rage in western Canada, the Environmental Protection Agency issued its first alert of the year for the Chicago area. The EPA is warning wildfire smoke will cause particle pollution on Thursday.

Smoke from wildfires raging in Canada has drifted into the United States, affecting air quality as far south as Florida.

The worst wildfires in decades are tearing through Saskatchewan, Canada, and at least two people have been killed in blazes in the neighboring province of Manitoba. Smoke from those fires has triggered air quality warnings in Michigan,