People with lung disease (including asthma), heart disease, and children and older adults, may experience health effects.

Cook County is under a heat watch through Thursday evening. Temperatures could feel like 105-110 degrees Wednesday.

Chicago faces an extreme heat watch with temperatures expected to reach mid-90s and heat indexes up to 115 degrees.

The possible hazards include damaging winds, large hail, an isolated tornado, and torrential downpours. Dew points and ...

Air quality in the Chicago area has remained poor for three days in a row, the NBC 5 Storm Team reported Wednesday morning.

CHICAGO (WLS) -- An air quality alert was extended through Wednesday by the National Weather Service for the Chicago area.

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

Millions of Americans across nine states were urged to avoid driving and limit outdoor activities on Wednesday as air quality ...

An Air Quality Alert has been issued through Tuesday for the Chicago area from wildfire smoke coming in from Canada.

Sensitive groups are advised to stay indoors and limit outdoor activities as pollution and ozone levels spike to unhealthy ...

Wednesday promises to be another hot, humid day. An Air Quality Alert continues, and there's a threat of storms.