Canada is having another bad wildfire season, and more than 27,000 people in three provinces have been forced to evacuate.

Sensitive groups are being advised to make outdoor activities shorter and less intense. Take more breaks. Watch for symptoms ...

Smoke from Canadian wildfires has begun to reach as far as Europe as the large and intense flames continue to threaten health ...

Daniel Craighead, an assistant professor in the School of Kinesiology at the University of Minnesota, weighs in ...