Extreme Heat Warning: Jefferson; Perry; Franklin; Jackson; Williamson; Union; Johnson; Pope; Alexander; Pulaski; Massac; Fulton; Hickman; Carlisle; Ballard; McCracken; Graves; Livingston; Marshall; Calloway; Perry; Bollinger; Cape Girardeau; Wayne; Carter; Ripley; Butler; Stoddard; Scott; Mississippi; New Madrid

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Extreme Heat Warning — Jefferson; Perry; Franklin; Jackson; Williamson; Union; Johnson; Pope; Alexander; Pulaski; Massac; Fulton; Hickman; Carlisle; Ballard; McCracken; Graves; Livingston; Marshall; Calloway; Perry; Bollinger; Cape Girardeau; Wayne; Carter; Ripley; Butler; Stoddard; Scott; Mississippi; New Madrid Severity: Severe. Certainty: Likely. * WHAT...For the Extreme Heat Warning, Dangerously hot conditions with heat index values up to 112 degrees expected, with locally higher values possible. For the Heat Advisory, heat index values up to around 109 degrees expected, with locally higher values possible. * WHERE...All of southeast Missouri, and neighboring portions of southwest Illinois and far western Kentucky. * WHEN...For the Extreme Heat Warning, from 11 AM this morning to 7 PM CDT this evening. For the Heat Advisory, from 7 PM this evening to 7 PM CDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...This Warning and Advisory is in effect along and west of a line from Mount Vernon, Illinois, to Murray, Kentucky.