Extreme Heat Warning

URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
416 AM PDT Tue Aug 18 2026

AZZ002-570-571-575-576-CAZ522-524>527-NVZ016-017-020-022-025-026-
191200-
/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 Amargosa Valley, Temple Bar, Pahrump,
Stovepipe Wells, Moapa, Wikieup, Needles, Desert Rock, North Las
Vegas, Valentine, Searchlight, Yucca Valley, Golden Valley, Mesquite,
Hoover Dam, Primm, Desert Hills, Bullhead City, Vidal Junction, Las
Vegas, Yucca, Mountain Pass, Topock, Hualapai Peak, Lake Havasu City,
Kingman, Furnace Creek, Baker, South Cove,
Cal-Nev-Ari, Morongo Valley, Boulder City, Twentynine Palms,
Laughlin, Dolan Springs, Henderson, Indian Springs, Overton, Mitchell
Caverns, and Shoshone
416 AM PDT Tue Aug 18 2026 /416 AM MST Tue Aug 18 2026/

...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM PDT /10 AM MST/
THIS MORNING 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/ this morning 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.

&&

$$

CM

Small Craft Advisory

URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
231 AM PDT Tue Aug 18 2026

PZZ571-181745-
/O.EXT.KMTR.SC.Y.0095.260819T0400Z-260819T2200Z/
Waters from Point Reyes to Pigeon Point 10-60 NM-
231 AM PDT Tue Aug 18 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 9 PM THIS EVENING TO
3 PM PDT WEDNESDAY...

* WHAT...Northwest winds 10 to 20 kt with gusts to 25 kt
  expected.

* WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM.

* WHEN...From 9 PM this evening to 3 PM PDT Wednesday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/sanfrancisco