* WHAT...For the first Heat Advisory, heat index values up to 113. For the second Heat Advisory, heat index values up to 109 expected. * WHERE...Northern Hancock, Northern Harrison, Northern Jackson, Southern Hancock, Southern Harrison, and Southern Jackson Counties. * WHEN...For the first Heat Advisory, until 7 PM CDT this evening. For the second Heat Advisory, from 10 AM to 8 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. 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.