Extreme Heat Warning
URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
1119 AM MST Sun Aug 16 2026
AZZ530>533-535-536-CAZ562-565>567-569-570-171000-
/O.CON.KPSR.XH.W.0008.260817T1700Z-260822T0300Z/
Parker Valley-Kofa-Yuma-Central La Paz-Southeast Yuma County-Gila
River Valley-Imperial County Southwest-Imperial County Southeast-
Imperial County West-Imperial Valley-Palo Verde Valley-Chuckwalla
Valley-
Including the cities of Yuma, Palo Verde, Blythe, Harcuvar,
Winterhaven, Martinez Lake, Ehrenberg, Calexico, Plaster City, El
Centro, Ripley, Salton City, Vicksburg Junction, Brenda, Mountain
Spring, Midland, Coyote Wells, Fortuna Foothills, Parker, Palm
Canyon, Ligurta, Alamorio, Vicksburg, Brawley, Quartzsite, Coolidge
Springs, Ocotillo, Salome, and Winona
1119 AM MST Sun Aug 16 2026 /1119 AM PDT Sun Aug 16 2026/
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM MST /10 AM PDT/
MONDAY TO 8 PM MST /8 PM PDT/ FRIDAY...
* WHAT...Dangerously hot and humid conditions. Afternoon temperatures
107 to 114 expected. Major Heat Risk.
* WHERE...Portions of southwest Arizona and southeast California.
* WHEN...From 10 AM MST /10 AM PDT/ Monday to 8 PM MST /8 PM PDT/
Friday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Overexposure can cause heat cramps and heat
exhaustion to develop and, without intervention, can lead to heat
stroke.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
An Extreme Heat Warning means that a period of very hot temperatures,
even by local standards, will occur. Actions should be taken to
lessen the impact of the extreme heat.
Take extra precautions if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose-fitting clothing when possible and
drink plenty of water.
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.
Public cooling shelters are available in some areas. Consult county
officials for more details.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Phoenix AZ
1119 AM MST Sun Aug 16 2026
AZZ534-538-539-541-549-553>555-559-171000-
/O.CON.KPSR.XH.W.0008.260817T1700Z-260822T0300Z/
Aguila Valley-Tonopah Desert-Gila Bend-Cave Creek/New River-
Fountain Hills/East Mesa-Northwest Pinal County-West Pinal County-
Apache Junction/Gold Canyon-Sonoran Desert Natl Monument-
Including the cities of Aguila, Tonopah, Arlington, Wintersburg,
Florence, Apache Junction, Sentinel, Cactus Forest, Gila Bend,
Wickenburg, Fountain Hills, Casa Grande, Kaka, Coolidge, Hassayampa,
Gladden, and Scottsdale
1119 AM MST Sun Aug 16 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM MONDAY TO 8 PM
MST FRIDAY...
* WHAT...Dangerously hot conditions. Afternoon temperatures 106 to
114 expected. Major Heat Risk.
* WHERE...Aguila Valley, Apache Junction/Gold Canyon, Cave Creek/New
River, Fountain Hills/East Mesa, Gila Bend, Northwest Pinal County,
Sonoran Desert Natl Monument, and Tonopah Desert.
* WHEN...From 10 AM Monday to 8 PM MST Friday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Overexposure can cause heat cramps and heat
exhaustion to develop and, without intervention, can lead to heat
stroke.
* ADDITIONAL DETAILS...In Maricopa County, call 2-1-1 to find a free
cooling center, transportation, water and more.
https://www.maricopa.gov/heat
PRECAUTIONARY/PREPAREDNESS ACTIONS...
An Extreme Heat Warning means that a period of very hot temperatures,
even by local standards, will occur. Actions should be taken to
lessen the impact of the extreme heat.
Take extra precautions if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose-fitting clothing when possible and
drink plenty of water.
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.
Public cooling shelters are available in some areas. Consult county
officials for more details.
&&
$$
Heat Advisory
URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
1221 PM PDT Sun Aug 16 2026
CAZ038-088-343>345-351-353-371>373-375-376-379-380-548-170730-
/O.NEW.KLOX.HT.Y.0013.260818T1700Z-260821T0300Z/
Cuyama Valley-Santa Clarita Valley-Southern Salinas Valley-San
Luis Obispo County Interior Valleys-San Luis Obispo County
Mountains-Santa Ynez Mountains Western Range-Santa Barbara County
Interior Mountains-Calabasas and Agoura Hills-Western San
Fernando Valley-Eastern San Fernando Valley-Santa Susana
Mountains-Southern Ventura County Mountains-Western San Gabriel
Mountains and Highway 14 Corridor-Eastern San Gabriel Mountains-
Los Angeles County San Gabriel Valley-
Including the cities of Matilija, Newhall, San Marcos Pass, Warm
Springs, Rose Valley, New Cuyama, East Los Angeles, Wrightwood,
Caliente Range, Chatsworth, Van Nuys, Acton, San Miguel, Topatopa
Mountains, Mount Baldy, Malibu Lake, Glendale, Big Pine Mountain, La
Canada Flintridge, San Rafael Mountain, Oat Mountain, Creston,
Carrizo Plain, Universal City, Pomona, El Monte, Templeton, Paso
Robles, Sunland, Pasadena, Lake Nacimiento, Shandon, Valencia,
Westlake Village, The Angeles Crest Highway, Woodland Hills,
Atascadero, Santa Margarita Lake, Lake Castaic, Burbank, Northridge,
Figueroa Mountain, Santa Clarita, Mill Creek, Mount Wilson, La Panza
Range, and San Gabriel
1221 PM PDT Sun Aug 16 2026
...HEAT ADVISORY IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT THURSDAY...
* WHAT...High temperatures of 92 to 105 expected, with most areas
seeing peak heat on Wednesday and Thursday. Low temperatures are
expected to range from the upper 60s to lower 70s at lower
elevations to the mid 70s to lower 80s in the foothills and
mountains.
* WHERE...A portion of southwest California.
* WHEN...From 10 AM Tuesday to 8 PM PDT Thursday.
* IMPACTS...Hot temperatures may cause heat illnesses. Warmer than
normal low temperatures will add to the heat discomfort.
* ADDITIONAL DETAILS...The heat advisory may need to be extended into
Friday for portions of the forecast area, but there remains
considerable uncertainty at this time.
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.
&&
$$
DG
Extreme Heat Watch
URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
1045 AM PDT Sun Aug 16 2026
AZZ002-570-571-575-576-CAZ522-524>527-NVZ016-017-020-022-025-026-
171200-
/O.NEW.KVEF.XH.A.0003.260818T1700Z-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 Vidal Junction, Twentynine Palms, Yucca
Valley, Mitchell Caverns, South Cove, Overton, Searchlight, Furnace
Creek, Las Vegas, Hualapai Peak, Pahrump, Topock, Valentine, Morongo
Valley, North Las Vegas, Desert Rock, Shoshone, Amargosa Valley,
Dolan Springs, Boulder City, Lake Havasu City, Stovepipe Wells,
Wikieup, Yucca, Mountain Pass, Needles, Laughlin, Moapa, Hoover Dam,
Temple Bar, Indian Springs, Henderson, Mesquite, Primm, Desert Hills,
Golden Valley, Kingman,
Baker, Cal-Nev-Ari, and Bullhead City
1045 AM PDT Sun Aug 16 2026 /1045 AM MST Sun Aug 16 2026/
...EXTREME HEAT WATCH IN EFFECT FROM TUESDAY MORNING THROUGH FRIDAY
EVENING...
* 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 Tuesday morning through Friday evening.
* 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.
Monitor the latest forecasts and warnings for updates.
&&
$$
JP
