National weather service Chicago
...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT /9 PM
EDT/ WEDNESDAY...

* WHAT...Dangerously hot conditions with heat index values
between 106 and 110.

* WHERE...Ogle, De Kalb, Kane, DuPage, Northern Cook, Central
Cook and Southern Cook Counties.

* WHEN...Until 8 PM CDT /9 PM EDT/ Wednesday.

* IMPACTS...Extreme heat and humidity will significantly
increase the potential for heat related illnesses,
particularly for those working or participating in outdoor
activities.

* ADDITIONAL DETAILS...Humidity may be lower on Wednesday with
high temperatures still in the mid to upper 90s.