Smoke from Canadian wildfires hovered over several Midwestern states Saturday, bringing warnings of unhealthy air.

S moke from Canadian wildfires has sent a blanket of smoke over the midwestern United States this weekend. The National ...

Smoke from forest fires is causing reduced visibility and poor air quality that is expected to persist into Sunday ...

Chicago's Air Quality Alert continues due to Canadian wildfire smoke, with health advisories for sensitive groups amidst ...

Wildfire smoke from the Prairies has prompted a special air-quality statement over much of northern Ontario Saturday.

Most of the Chicago area remains under an Air Quality Alert on Saturday due to smoke from Canadian wildfires. The alert was, at one point, set to expire late Friday night for most of the area, but it ...

An Air Quality Action Day was issued for several northern Indiana cities on Friday due to Canadian wildfire smoke.