* WHAT...Dangerously hot conditions with heat index values of 100 to 110.

* WHERE...Portions of northwest and west central Illinois, east central and southeast Iowa, and northeast Missouri.

* WHEN...Until 7 PM CDT this evening.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. close