597
WWUS75 KVEF 201157
NPWVEF

URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
457 AM PDT Thu Aug 20 2026

AZZ002-570-571-575-576-CAZ522-524>527-NVZ016-017-020-022-025-026-
211200-
/O.CON.KVEF.XH.W.0004.000000T0000Z-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 Topock, Golden Valley, Amargosa Valley,
Mesquite, Lake Havasu City, Morongo Valley, Twentynine Palms,
Stovepipe Wells, Vidal Junction, Cal-Nev-Ari, Primm, Laughlin,
Mitchell Caverns, Overton, Baker, Mountain Pass, Desert Rock, North
Las Vegas, Pahrump, Furnace Creek, Indian Springs, Henderson, Yucca,
South Cove, Moapa, Boulder City, Temple Bar, Needles, Shoshone,
Valentine, Hualapai Peak, Dolan Springs, Yucca Valley, Hoover Dam,
Searchlight, Bullhead City, Kingman, Las Vegas, Wikieup, and Desert
Hills
457 AM PDT Thu Aug 20 2026 /457 AM MST Thu Aug 20 2026/

...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 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...Until 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.

&&

$$

CM