Cook County is under a heat watch through Thursday evening, according to forecasters. The temperature could rise to feel like ...

The building heat and humidity comes as Chicago's air quality readings early Monday morning were "unhealthy for sensitive groups," the website AirNow.gov said. The air quality ranked as a level three ...

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

Dangerous heat and humidity will move into the Chicago area forecast this week, the NBC 5 Storm Team said, with an extreme heat watch set to take effect mid-week and “feels like” temperatures as high ...