* WHAT…Heat index values up to 109 expected. * WHERE…Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN…From 11 AM this morning to 7 PM CDT this evening. * IMPACTS…Hot temperatures and high humidity may cause heat illnesses.
Source: National Weather Service
Indexed: Tue, 15 Sep 2026 13:20:24 UTC
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