643
WWUS75 KVEF 172032
NPWVEF
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
132 PM PDT MON AUG 17 2026
AZZ002-570-571-575-576-CAZ522-524>527-NVZ016-017-020-022-025-026-
181200-
/O.CON.KVEF.XH.W.0004.260818T1700Z-260822T0300Z/
LAKE HAVASU AND FORT MOHAVE-LAKE MEAD - AZ SIDE-LAKE MOHAVE - AZ
SIDE-HUALAPAI MOUNTAINS-NORTHWEST DESERTS-DEATH VALLEY NATIONAL
PARK-EASTERN MOJAVE DESERT-MORONGO BASIN-CADIZ BASIN-SAN
BERNARDINO COUNTY-UPPER COLORADO RIVER VALLEY-NORTHEAST CLARK
COUNTY-WESTERN CLARK AND SOUTHERN NYE COUNTY-LAS VEGAS VALLEY-
SOUTHERN CLARK COUNTY-LAKE MEAD - NV SIDE-LAKE MOHAVE - NV SIDE-
INCLUDING THE CITIES OF KINGMAN, SOUTH COVE, OVERTON, HOOVER DAM,
PRIMM, YUCCA, FURNACE CREEK, LAS VEGAS, AMARGOSA VALLEY, STOVEPIPE
WELLS, VALENTINE, MORONGO VALLEY, VIDAL JUNCTION, SEARCHLIGHT,
PAHRUMP, BOULDER CITY, MOUNTAIN PASS, TEMPLE BAR,
LAKE HAVASU CITY, HUALAPAI PEAK, DESERT ROCK, CAL-NEV-ARI,
LAUGHLIN, TWENTYNINE PALMS, NORTH LAS VEGAS, MITCHELL CAVERNS, DESERT
HILLS, SHOSHONE, DOLAN SPRINGS, TOPOCK, GOLDEN VALLEY, MOAPA, YUCCA
VALLEY, INDIAN SPRINGS, MESQUITE, WIKIEUP, BULLHEAD CITY, BAKER,
NEEDLES, AND HENDERSON
132 PM PDT MON AUG 17 2026 /132 PM MST MON AUG 17 2026/
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM PDT /10 AM MST/
TUESDAY TO 8 PM PDT /8 PM MST/ FRIDAY...
* WHAT...DANGEROUSLY HOT CONDITIONS WITH TEMPERATURES UP TO 115 TO
118 DEGREES EXPECTED THROUGH DEATH VALLEY AND THE LOWER COLORADO
RIVER VALLEY, WITH HIGHS BETWEEN 107 TO 110 DEGREES ELSEWHERE.
* WHERE...PORTIONS OF NORTHWEST ARIZONA, SOUTHEAST CALIFORNIA, AND
SOUTHERN NEVADA.
* WHEN...FROM 10 AM PDT /10 AM MST/ TUESDAY TO 8 PM PDT /8 PM MST/
FRIDAY.
* IMPACTS...HEAT-RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS.
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.
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.
MONITOR THE LATEST FORECASTS AND WARNINGS FOR UPDATES.
JP
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