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

Smoke from Canadian wildfires carried another day of poor air quality south of the border to the Midwest, where conditions in ...

Canadian wildfire smoke is fouling air quality in the US and several states, including Minnesota, Wisconsin, and Michigan, experience unhealthy air. Wildfire smoke has been fouling U.S. air quality ...

Iowans — especially those with heart and lung disease — should avoid long or intense activities and take extra breaks during strenuous activity outdoors in areas where air quality is rated unhealthy.

Thick smoke from fires in central and western Canada pulled down to the surface early Tuesday, and levels in Northwest Iowa have been measured in the unhealthy category.