Officials warn southeast Michigan residents to be careful outdoors Tuesday because of expected high ozone pollution levels.

Smoke from Canadian wildfires persisted across the Upper Midwest on Friday, prompting air quality alerts for millions.

A special weather statement and warning have been issued for southern Ontario on Wednesday. The heat warning continues with temperature highs around 32 C or 40 C with the humidex in the Greater ...

Windsor-Essex, Chatham-Kent and Sarnia-Lambton can all expect elevated air pollution levels again Tuesday. Environment and ...

The Mid-Ohio Regional Planning Commission has issued an air quality alert for July 23 for four central Ohio counties, ...

Likewise, most of Wisconsin had been issued an air quality alert over Canadian wildfire smoke. "People with heart disease: ...

Much of Central Canada was placed under special air quality statements amid smoke from wildfires, as Environment Canada ...

Firefighters bolstered containment on the Green Fire in the Shasta-Trinity forest, while the Orleans Complex grew. What to ...

Air quality, smoke and ozone alerts are in effect for much of the state heading into a hot, smoky weekend. A red flag warning ...

Besides temperatures feeling in the high 90s, Chicago and surrounding areas are under an air quality alert until midnight, ...

Firefighters on the Green Fire in the Shasta-Trinity forest and Butler Fire in the Orleans Complex brace for storms on Friday ...

Brantford-Brant and Haldimand-Norfolk are under dual weather warnings from the Grand Erie Public Health Unit and Environment ...