38°4'N / 89°22'W / Altitude 132 m / 02:17 2026/09/16, America/Chicago (UTC-5)
From: 2026/09/15, 23:46
To: 2026/09/16, 17:15
* WHAT...Daily peak heat index values of 103 to 109 today and Thursday, then 100 to 105 Friday and Saturday. * WHERE...Portions of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri. * WHEN...Until 7 PM CDT /8 PM EDT/ Saturday. * IMPACTS...Record to near record hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...The Heat Advisory has been extended thru Saturday for the entire Quad State Region.