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

Wildfire smoke degrades air quality in swaths of Ontario, with Toronto ranking among the worst in the world on Monday.

An Air Quality Alert will be in effect through midnight Tuesday for Southeast Michigan, the state's Department of Environment, Great Lakes and Energy announced Monday. The alert is an extension of an existing alert that was issued statewide Saturday and expected to expire Monday night because of drifting wildfire smoke from Canada.