...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM CDT WEDNESDAY for Cass, Audubon, Guthrie, Adair, Madison, Adams, Union, Taylor and Ringgold counties. and until 10:00 p.m. Wednesday for Harrison, Shelby, Pottawattamie, Mills, Montgomery, Fremont, and Page Counties. *An Excessive Heat Watch is in place until Wednesday evening for Crawford and Carroll Counties.* *A Heat Advisory is in place for Monona County until Wednesday at 10:00 p.m.** * WHAT...An extended period of dangerously hot conditions with heat index values up to 114. * WHERE...Much of the southern half of Iowa. * WHEN...Until 9 PM CDT Wednesday. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...The long duration of the heat can be particularly hard on the very young, the elderly and those with medical conditions. 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. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.