Fairfax County is currently under a heat advisory, along with much of the D.C. metro area.
As of 1:55 p.m., the heat index for Reston, Va. was 99 degrees, according to the National Weather Service.
The area will remain under advisory until 8 p.m.  The heat index is expected to hover around 100 degrees throughout the rest of the afternoon. Be careful: The combination of heat and humidity is potentially dangerous for anyone spending an extended period time outside — or inside without air conditioning.
From the National Weather Service:
… HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM EDT THIS EVENING…
THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS ISSUED A HEAT ADVISORY… WHICH IS IN EFFECT FROM NOON TODAY TO 8 PM EDT THIS EVENING.
* HEAT INDEX VALUES… AROUND 100 DEGREES DUE TO TEMPERATURES IN THE LOW TO MID 90S… AND DEWPOINTS AROUND 70 DEGREES.
* IMPACTS… RISK OF HEAT-RELATED ILLNESS FOR THOSE WITHOUT AIR- CONDITIONING OR THOSE OUTDOORS FOR AN EXTENDED PERIOD.PRECAUTIONARY/PREPAREDNESS ACTIONS…
A HEAT ADVISORY MEANS THAT A PERIOD OF HIGH TEMPERATURES IS EXPECTED. THE COMBINATION OF HIGH TEMPERATURES AND HIGH HUMIDITY WILL CREATE A SITUATION IN WHICH HEAT ILLNESSES ARE POSSIBLE.
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.
(Photo via Flickr Commons)
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