...HEAT ADVISORY NOW IN EFFECT UNTIL 7 PM CDT THURSDAY... * WHAT...Heat index values up to 108 degrees are expected this afternoon and again Thursday afternoon. * WHERE...Portions of south central and southwest Arkansas, north central and northwest Louisiana, and east and northeast Texas. * WHEN...Until 7 PM CDT Thursday. * IMPACTS...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. &&