Heat Advisory issued July 27 at 8:03AM CDT until July 27 at 9:00PM CDT by NWS Chicago IL
Issue date: 2026-07-27T13:03+00:00
* WHAT...Peak heat index values up to 100 to 110 degrees expected. * WHERE...In Illinois, Boone, Kane, Kendall, and McHenry 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.
