The heat and humidity are back. The National Weather Service in Sioux Falls has issued a Heat Advisory for much of southeast South Dakota, including Sioux Falls, until 7:00 PM Friday. Heat index values are expected to be between 100 to 105 this afternoon. Drink lots of water and try to stay out of the heat as much as possible.

* WEATHER CONDITIONS...TEMPERATURES REACHING THE LOWER TO MIDDLE
  90S COMBINES WITH HIGH HUMIDITY WILL RESULT IN A HEAT INDEX OF
  100 TO 105 DEGREES THIS AFTERNOON INTO THE START OF THE EVENING.

 *IMPACTS...PROLONGED EXPOSURE TO HOT AND HUMID CONDITIONS MAY
  LEAD TO HEAT RELATED ILLNESS. EXCESSIVE HEAT MAY ALSO IMPACT
  THOSE MORE SUSCEPTIBLE TO ILLNESS...INCLUDING CHILDREN...THE
  ELDERLY AND PETS.

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.