CHICAGO - An Air Quality Alert is in effect until midnight Wednesday night for the following counties: McHenry, Lake (IL), ...

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 building heat and humidity comes as Chicago’s air quality readings early Monday morning were “unhealthy for sensitive groups,” the website AirNow.gov said.

Actually, Chicago’s air quality was among the worst in the world after the Canadian wildfire smoke drifted south to create unsafe conditions for seniors, young children and people with ...

By 12:30 p.m., the Air Quality Index had reached unhealthy levels in the entire Chicago area, with AirNow.gov showing the city with an AQI of 163, the north and west suburbs with an AQI of 158 and ...

A historic, deadly heat wave affected much of the Midwest and specifically Chicago in July of 1995. Over 700 deaths were ...

The Environmental Protection Agency’s AirNow is a go-to source for air quality data and uses high-quality sensors that are closely monitored. On Wednesday, it showed good air quality in Chicago.

Chicago's air quality ranked among worst in the world due to Canadian wildfire smoke Another large fire exacerbated by climate change is threatening the health of Chicagoans. Government officials ...