HEAT ADVISORY IN EFFECT FROM NOON CDT /1 PM EDT/ TO 7 PM CDT /8 PM EDT/ WEDNESDAY... The National Weather Service in Chicago has issued a Heat Advisory, which is in effect from noon CDT /1 PM EDT/ to 7 PM CDT/8 PM EDT/ Wednesday. * TEMPERATURE...around 90. * HEAT INDICES...Peak afternoon heat indices near 105 degrees. * IMPACTS...The combination of heat and humidity will lead to hazardous conditions, particularly for the elderly and those with pre-existing health conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. The combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible. 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...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 light weight and loose fitting clothing when possible and drink plenty of water. 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.