‘Dangerous heat, humidity’ arrive in Chicago area – NBC Chicago

A heat advisory has been issued for most of the Chicago area Sunday, as temperatures will soar into the 90s and heat indices will climb above 100 degrees in areas away from Lake Michigan.

According to the National Weather Service, the “dangerous heat and humidity” led to the issuing of a heat advisory beginning at 1 p.m., taking effect in McHenry, DeKalb, Kane, DuPage, LaSalle, Kendall, Grundy, Will and Kankakee counties in Illinois, as well as southern Cook County.

In those areas, highs are expected to rise into the low-90s Sunday, but the real story will be the humidity, as heat indices will rise above 100 degrees, making for dangerously-warm conditions.

Residents are urged to take frequent breaks indoors or in the shade, and to remain hydrated at all times.

Areas near Lake Michigan were spared from the advisory, as was northwest Indiana. NWS did issue an air quality action day alert for northwest Indiana however, with high ozone levels contributing to…