Extreme Heat Warning
2026-08-16T20:00:00-05:00

* WHAT...Dangerously hot conditions with daily heat indices in the triple digits up to around 110 degrees; localized higher heat indices are possible. * WHERE...All of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri. * WHEN...Until 8 PM CDT /9 PM EDT/ Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Maximum heat indices Friday ranged from 102 degrees to 113 degrees. This weekend will see similar numbers, as actual air temperatures top out from the mid 90s to around 100 degrees.

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