...HEAT ADVISORY NOW IN EFFECT UNTIL 8 PM EDT TUESDAY... * WHAT...Heat index values around 100. * WHERE...Calhoun, Eaton, Ingham, Jackson, Allegan, Barry, Kalamazoo, and Van Buren Counties. * WHEN...Until 8 PM EDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Hot and humid weather will continue through Tuesday with heat index values near 100. With hot conditions persisting into a fourth day on Tuesday, the cumulative effects of the heat will wear on people so check on those vulnerable to heat. Hot and humid weather will persist through the week. 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. &&