NWS / NOAA weather: Extreme Heat Warning issued June 30 at 1:25PM CDT until July 3 at 10:00PM CDT by NWS St Louis MO

* WHAT...Dangerously hot conditions with heat index values up to 108.

* WHERE...Portions of south central, southwest, and west central
Illinois and central, east central, northeast, and southeast
Missouri.

* WHEN...Until 10 PM CDT Friday.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events.

Source: NWS / NOAA weather.