AN EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 4 AM CDT
FRIDAY.

* TEMPS AND HEAT INDEX...HIGH TEMPERATURES THIS AFTERNOON WILL
  CLIMB INTO THE UPPER 90S TO AROUND 100 DEGREES. THE HEAT
  COMBINED WITH OPPRESSIVELY HIGH HUMIDITY VALUES WILL RESULT IN
  HEAT INDEX READINGS PEAKING BETWEEN 110 AND 115 DEGREES. IT
  WILL REMAIN OPPRESSIVELY HOT AND HUMID TONIGHT WITH LOWS ONLY
  DIPPING BRIEFLY INTO THE UPPER 70S IN THE SUBURBS BUT HOLDING IN
  THE 80S IN THE CITY. HEAT INDEX READING TONIGHT WILL ONLY
  GRADUALLY FALL BELOW 100 INTO THE 90S BY LATE TONIGHT IN THE
  CITY...CREATING EXTREMELY DANGEROUS CONDITIONS. HIGHS ON
  THURSDAY WILL ONCE AGAIN SOAR INTO THE 90S WITH HEAT INDEX
  READINGS OF 105 TO 110.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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. IN THE CITY OF CHICAGO...CALL THE
24 HOUR 3 1 1 HEAT EMERGENCY NUMBER.

AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF
DANGEROUSLY HOT TEMPERATURES WILL OCCUR. THE COMBINATION OF HOT
TEMPERATURES AND HIGH HUMIDITY WILL CREATE A DANGEROUS SITUATION
IN WHICH HEAT ILLNESSES ARE LIKELY. DRINK PLENTY OF FLUIDS...STAY
IN AN AIR-CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK UP
ON RELATIVES AND NEIGHBORS.