• Excessive Heat Warning for St. Clair County, Illinois
  • Excessive Heat Warning issued August 28 at 3:40AM CDT until August 28 at 7:00PM CDT by NWS
  • Effective: Tuesday, August 28, 2018 at 3:40 a.m.
  • Expires: Tuesday, August 28, 2018 at 7 p.m.

  • ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS
    EVENING...
    * TIMING...Dangerous levels of heat and humidity are expected
    again this afternoon.
    * HEAT INDEX VALUES...Peaking between 103 and 107 this afternoon.
    * IMPACTS...The heat and humidity may cause heat stress during
    outdoor exertion or extended exposure. The very young, the
    elderly, those without air conditioning, and those
    participating in strenuous outdoor activities will be the most
    susceptible. Also, car interiors can reach lethal temperatures
    in a matter of minutes.