McLean, Fairfax County under Heat Advisory Friday Until 9 p.m.

THE NATIONAL WEATHER SERVICE HAS ISSUED A HEAT ADVISORY...IN EFFECT FROM 11 AM TO 9 PM EDT FRIDAY. 

* TEMPERATURES...IN THE UPPER 90S TO LOWER 100S. 

* HEAT INDEX VALUES...105 TO 109. 

PRECAUTIONARY/PREPAREDNESS ACTIONS... 

A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES 
IS EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND HIGH 
HUMIDITY WILL 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 IN 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 LIGHTWEIGHT 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.