901
WWUS71 KLWX 181150
NPWLWX
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
750 AM EDT SAT JUL 18 2026
DCZ001-MDZ011-013-014-016>018-VAZ053>057-527-182300-
/O.CON.KLWX.HT.Y.0011.260718T1500Z-260718T2300Z/
DISTRICT OF COLUMBIA-SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE
ARUNDEL-CHARLES-ST. MARYS-CALVERT-FAIRFAX-ARLINGTON/FALLS
CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-KING GEORGE-CENTRAL AND
SOUTHEAST PRINCE WILLIAM/MANASSAS/MANASSAS PARK-
750 AM EDT SAT JUL 18 2026
..HEAT ADVISORY REMAINS IN EFFECT THROUGH 7 PM EDT THIS EVENING
* WHAT...HEAT INDEX VALUES AROUND 105 EXPECTED.
* WHERE...WASHINGTON DC, AND PORTIONS OF CENTRAL, NORTHERN, AND
SOUTHERN MARYLAND, AND CENTRAL AND NORTHERN VIRGINIA.
* WHEN...FROM 11 AM THIS MORNING TO 7 PM EDT THIS EVENING.
* IMPACTS...HOT TEMPERATURES AND HIGH HUMIDITY MAY CAUSE HEAT
ILLNESSES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 WHEN OUTSIDE. WEAR LIGHTWEIGHT AND LOOSE
FITTING CLOTHING. TRY TO LIMIT STRENUOUS ACTIVITIES TO EARLY MORNING
OR EVENING. TAKE ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND
HEAT STROKE.
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! IN CASES OF HEAT STROKE, CALL 9 1 1.
DHOF
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page