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The "unhealthy" air, which ranks as level four of six on the Air Quality Index, comes after multiple consecutive days of air quality alerts.

Air quality alerts were in effect in Iowa, Minnesota, Wisconsin and Michigan, as well as eastern Nebraska and parts of ...

Smoke from Canadian wildfires has drifted into the Midwest and northeastern US, causing hazy skies and prompting air quality ...

Smoke from widespread Canadian wildfires has spread into the US, particularly affecting the Midwest and Northeast, leading to ...

Health officials from Minnesota to Maine have issued alerts warning of poor air quality from wildfires burning in Canada.

The National Weather Service has opted to extend an air quality alert in the Chicago area for another day.

Most of the Chicago area remains under an Air Quality Alert this weekend due to smoke from Canadian wildfires.