National Weather Service/Des Moines (Issued 3:47-p.m. CDT June 26th, 2012) http://www.crh.noaa.gov/dmx/

DANGEROUS HEAT INDICES EXPECTED WEDNESDAY AFTERNOON INTO THE EARLY EVENING. HOT TEMPERATURES COMBINED WITH DEW POINT TEMPERATURES CLIMBING INTO THE 70S DURING THE AFTERNOON WILL PRODUCE HEAT INDICES ABOVE 100 OVER MUCH OF CENTRAL IOWA AND AROUND 105 DEGREES DURING THE AFTERNOON.

A HEAT ADVISORY IS IN EFFECT FROM 1 PM TO 8 PM CDT WEDNESDAY FOR ALL BUT FAR WEST/SW IA, WHERE THE ADVISORY IS IN EFFECT UNTIL 9-P.M. WEDNESDAY…

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A HEAT ADVISORY. HEAT INDICES WILL BE INCREASING THROUGH THE MORNING BE IN ADVISORY CRITERIA FROM WEDNESDAY AFTERNOON INTO THE EARLY EVENING HOURS. THE HIGHEST HEAT INDICES OF 105 TO 108 WILL OCCUR DURING THE AFTERNOON. HEAT INDICES WEST OF INTERSTATE 35 WILL NOT BE QUITE AS HOT BUT STILL APPROACH 105.

THE COMBINATION OF HEAT AND HUMIDITY WILL CREATE AN INCREASED RISK OF HEAT EXHAUSTION OR OTHER HEAT RELATED ILLNESSES. THE RISK WILL INCREASE WITH PROLONGED OUTDOOR ACTIVITY WITH THE ELDERLY AND VERY YOUNG BEING MOST AT RISK.

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.