According to the National Weather Service, the air quality alert remains in effect through midnight in parts of the Chicago area, including Kane, DuPage, Kendall, Grundy, Cook and Will counties.

Chicago air quality remains in the top five worst in the world Friday with an Air Quality Alert in place from Canadian wildfire smoke.

Wildfire smoke brings hazy skies and poor air quality to Chicago today, with hot and humid weather building into the weekend.

While the haze slightly lifted Saturday morning, air quality levels are expected to worsen across the Chicago area over the rest of the weekend.

National Weather Service officials issued an air quality alert set to expire at midnight Saturday for the Chicago and surrounding areas. The Illinois Environmental Protection Agency determined an

While some smoke will exit the state Tuesday, a new band will blow into northern Minnesota creating conditions that are unhealthy for sensitive groups.

Health officials say the ozone advisory is especially important for children, older adults, and people with respiratory or heart conditions.