Heat Advisory issued July 15 at 2:59AM CDT until July 15 at 8:00PM CDT by NWS St Louis MO

* WHAT...Heat index values up to 109.

* WHERE...In Illinois, Madison IL and Saint Clair IL Counties. In
Missouri, Saint Charles MO, Saint Louis City MO, and Saint Louis
MO Counties.

* WHEN...Until 8 PM CDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.