Heat Advisory issued July 27 at 9:33AM CDT until July 27 at 9:00PM CDT by NWS Chicago IL
Issue date: 2026-07-27T14:33+00:00
* WHAT...Heat index values in excess of 105 expected. * WHERE...In Illinois, Central Cook, DuPage, Lake IL, Northern Cook, and Southern Cook Counties. In Indiana, Benton, Jasper, Lake IN, and Newton Counties. * WHEN...Until 9 PM CDT /10 PM EDT/ this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
