NWS / NOAA weather: Extreme Heat Warning issued June 30 at 8:40PM CDT until July 3 at 12:00AM CDT by NWS Chicago IL

* WHAT...Dangerously hot conditions with heat index values around
105 expected each afternoon.

* WHERE...Cook County.

* WHEN...Until midnight CDT Thursday Night.

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

* ADDITIONAL DETAILS...Dangerous heat is expected to persist through
Thursday. Thunderstorms may begin to bring some relief from the
heat by Thursday afternoon or evening.

Source: NWS / NOAA weather.