...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM CDT THURSDAY... ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... * WHAT...For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 113. For the Heat Advisory, heat index values up to 109 expected. * WHERE...Portions of central, eastern, southeast, southwest, and western Arkansas. * WHEN...For the Extreme Heat Warning, until 8 PM CDT this evening. For the Heat Advisory, from 11 AM to 8 PM CDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses. 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. 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. &&