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 ...

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

Clear protocols for identifying heat illness, safety training, paid breaks and access to water and shade are among the steps ...