Issue date: 2026-09-13T16:12+00:00
* WHAT...High temperatures in the mid to upper 90s, with stifling humidity creating Peak Heat Index values up to around 105 degrees. * WHERE...All of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri. * WHEN...From 11 AM CDT /noon EDT/ to 8 PM CDT /9 PM EDT/ Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.