Heat Advisory issued July 28 at 1:52PM CDT until July 28 at 7:00PM CDT by NWS St Louis MO
Issue date: 2026-07-28T18:52+00:00
* WHAT...Heat index values up to 104. * WHERE...In Illinois, Bond IL, Clinton IL, Marion IL, and Madison IL Counties. In Missouri, Osage MO, Franklin MO, Gasconade MO, Saint Charles MO, Saint Louis City MO, and Saint Louis MO Counties. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
