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Extreme Heat Warning
ActiveMadison; St. Clair; Monroe; St. Charles; St. Louis
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* WHAT...Dangerously hot conditions with heat index values up to around 110 expected.
* WHERE...In Illinois, Madison IL, Monroe IL, and Saint Clair IL Counties. In Missouri, Jefferson MO, Saint Charles MO, Saint Louis City MO, and Saint Louis MO Counties.
* WHEN...From noon Sunday to midnight CDT Thursday Night.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
Data from the National Weather Service
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