795
WWUS71 KLWX 040205
NPWLWX
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1005 PM EDT FRI JUL 3 2026
DCZ001-MDZ004>006-008-011-013-014-016>018-503>508-VAZ036>040-050-051-
053>057-501-502-505-506-526-527-041015-
/O.CON.KLWX.XH.W.0004.260704T1400Z-260705T0100Z/
DISTRICT OF COLUMBIA-FREDERICK-CARROLL-NORTHERN BALTIMORE-CECIL-
SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-
CALVERT-NORTHWEST MONTGOMERY-CENTRAL AND SOUTHEAST MONTGOMERY-
NORTHWEST HOWARD-CENTRAL AND SOUTHEAST HOWARD-NORTHWEST HARFORD-
SOUTHEAST HARFORD-NELSON-ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-
ORANGE-CULPEPER-FAIRFAX-ARLINGTON/FALLS CHURCH/ALEXANDRIA-
STAFFORD-SPOTSYLVANIA-KING GEORGE-NORTHERN FAUQUIER-SOUTHERN
FAUQUIER-WESTERN LOUDOUN-EASTERN LOUDOUN-NORTHWEST PRINCE WILLIAM-
CENTRAL AND SOUTHEAST PRINCE WILLIAM/MANASSAS/MANASSAS PARK-
1005 PM EDT FRI JUL 3 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM TO 9 PM EDT
SATURDAY...
* WHAT...FOR THE EXTREME HEAT WARNING, DANGEROUSLY HOT CONDITIONS
WITH HEAT INDEX VALUES 110 TO 115 EXPECTED.
* WHERE...PORTIONS OF DC, CENTRAL, NORTH CENTRAL, NORTHEAST,
NORTHERN, AND SOUTHERN MARYLAND, AND CENTRAL, NORTHERN, AND
NORTHWEST VIRGINIA.
* WHEN...FROM 10 AM TO 9 PM EDT SATURDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT AND HIGH HUMIDITY EVENTS. HOT TEMPERATURES AND HIGH
HUMIDITY MAY CAUSE HEAT ILLNESSES.
* ADDITIONAL DETAILS...EARLY MORNING LOW TEMPERATURES IN THE 70S AND
80S COMBINED WITH OPPRESSIVE HUMIDITY WILL RESULT IN LITTLE TO NO
OVERNIGHT RELIEF. PROLONGED EXCESSIVE HEAT MAY IMPACT POWER,
WATER, AND TRANSPORTATION SYSTEMS. HEAT INDEX VALUES AROUND 100
ARE POSSIBLE AGAIN SUNDAY AFTERNOON.
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.
DO NOT LEAVE YOUNG CHILDREN AND PETS IN UNATTENDED VEHICLES. CAR
INTERIORS WILL REACH LETHAL TEMPERATURES IN A MATTER OF MINUTES.
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.
MDZ003-502-VAZ025>031-504-WVZ050>053-055-502-504-506-041015-
/O.CON.KLWX.HT.Y.0007.260704T1400Z-260705T0000Z/
WASHINGTON-CENTRAL AND EASTERN ALLEGANY-AUGUSTA-ROCKINGHAM-
SHENANDOAH-FREDERICK-PAGE-WARREN-CLARKE-EASTERN HIGHLAND-
HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-HARDY-EASTERN GRANT-EASTERN
MINERAL-EASTERN PENDLETON-
1005 PM EDT FRI JUL 3 2026
..HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM EDT SATURDAY
* WHAT...HEAT INDEX VALUES OF 100 TO 104 EXPECTED.
* WHERE...PORTIONS OF NORTH CENTRAL AND WESTERN MARYLAND, NORTHWEST
AND WESTERN VIRGINIA, AND EASTERN AND PANHANDLE WEST VIRGINIA.
* WHEN...FROM 10 AM TO 8 PM EDT SATURDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT AND HIGH HUMIDITY EVENTS. HOT TEMPERATURES AND HIGH
HUMIDITY MAY CAUSE HEAT ILLNESSES.
* ADDITIONAL DETAILS...EARLY MORNING LOW TEMPERATURES IN THE AROUND
70 COMBINED WITH OPPRESSIVE HUMIDITY WILL RESULT IN LITTLE TO NO
OVERNIGHT RELIEF. PROLONGED EXCESSIVE HEAT MAY IMPACT POWER,
WATER, AND TRANSPORTATION SYSTEMS.
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.
EST
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