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

* WHAT...Heat index values up to 104 expected. * WHERE...Portions of north central, northeast, and northwest Ohio and northwest Pennsylvania. * WHEN...From noon Sunday to 8 PM EDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...Consecutive days of excessive heat and humidity combined with little relief overnight due to very warm low temperatures can be especially hazardous. The heat may continue into Wednesday.