Extreme Heat Warning
URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
1219 PM PDT Tue Aug 25 2026
CAZ060-260515-
/O.CON.KSGX.XH.W.0008.000000T0000Z-260829T0300Z/
Apple and Lucerne Valleys-
Including the cities of Southern California Logistics Airport,
Victorville, Apple Valley, Hesperia, and Adelanto
1219 PM PDT Tue Aug 25 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY...
* WHAT...Dangerously hot conditions with high temperatures in the
upper 90s to 105 expected.
* WHERE...Apple and Lucerne Valleys.
* WHEN...Until 8 PM PDT Friday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Hot temperatures may cause heat illnesses.
* ADDITIONAL DETAILS...Low temperatures 5 to 10 degrees above normal
will limit relief from the heat. Increasing temperatures through
Friday will increase the threat of heat-related illness across
populations.
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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Hanford CA
1137 AM PDT Tue Aug 25 2026
CAZ337>339-260300-
/O.CON.KHNX.XH.W.0003.000000T0000Z-260827T0600Z/
Indian Wells Valley-Mojave Desert Slopes-Mojave Desert-
Including the cities of California City, Edwards AFB, Randsburg,
Mojave, Inyokern, Ridgecrest, and Rosamond
1137 AM PDT Tue Aug 25 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 11 PM PDT
WEDNESDAY...
* WHAT...Dangerously hot conditions with high temperatures up to 108
degrees expected. Morning low temperatures between 75 and 80
degrees will provide little relief at night. Major to Extreme Heat
Risk is expected during this time.
* WHERE...Indian Wells Valley, Mojave Desert, and Mojave Desert
Slopes.
* WHEN...Until 11 PM PDT Wednesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
Stay cool, stay hydrated, stay informed.
Monitor the latest forecasts and warnings for updates.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
1042 AM PDT Tue Aug 25 2026
CAZ038-088-351>353-356>358-369>376-378>383-548-290300-
/O.CON.KLOX.XH.W.0006.000000T0000Z-260829T0300Z/
Cuyama Valley-Santa Clarita Valley-Santa Ynez Mountains Western
Range-Santa Ynez Mountains Eastern Range-Santa Barbara County
Interior Mountains-Lake Casitas-Ojai Valley-Central Ventura
County Valleys-Western Santa Monica Mountains Recreational Area-
Eastern Santa Monica Mountains Recreational Area-Calabasas and
Agoura Hills-Western San Fernando Valley-Eastern San Fernando
Valley-Southeastern Ventura County Valleys-Santa Susana Mountains-
Southern Ventura County Mountains-Interstate 5 Corridor-Western
San Gabriel Mountains and Highway 14 Corridor-Eastern San Gabriel
Mountains-Western Antelope Valley Foothills-Eastern Antelope
Valley Foothills-Antelope Valley-Los Angeles County San Gabriel
Valley-
Including the cities of Van Nuys, Simi Valley, Palmdale, Malibu Lake,
Pyramid Lake, Meiners Oaks, Malibu Bowl, Santa Clarita, Chatsworth,
La Canada Flintridge, Matilija, Mill Creek, Oat Mountain, Big Pine
Mountain, Wrightwood, Pearblossom, Topanga, Oak View, Lake Los
Angeles, Figueroa Mountain, Newbury Park, San Marcos Pass, Tejon
Pass, Valyermo, Warm Springs, Llano, Elizabeth Lake, Lancaster,
Gorman, Northridge, Thousand Oaks, East Los Angeles, Glendale,
Woodland Hills, Topatopa Mountains, Mount Wilson, Lake Palmdale,
Fillmore, Santa Paula, Burbank, Mount Baldy, Pasadena, Rose Valley,
Pomona, Lake Castaic, Universal City, Acton, Newhall, The Angeles
Crest Highway, New Cuyama, San Rafael Mountain, San Gabriel, Ojai,
Sunland, Montecito Hills, Westlake Village, Moorpark, Valencia, El
Monte, and Piru
1042 AM PDT Tue Aug 25 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY...
* WHAT...Dangerously hot conditions with temperatures up to 110.
* WHERE...A portion of southwest California.
* WHEN...Until 8 PM PDT 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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
1029 AM PDT Tue Aug 25 2026
AZZ002-570-571-575-576-CAZ522>527-NVZ016-017-020-022-025-026-261000-
/O.CON.KVEF.XH.W.0005.000000T0000Z-260829T0300Z/
Lake Havasu and Fort Mohave-Lake Mead - AZ side-Lake Mohave - AZ
side-Hualapai Mountains-Northwest Deserts-Death Valley National
Park-Western Mojave Desert-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 Valentine, Wikieup, Indian Springs,
Temple Bar, Henderson, Cal-Nev-Ari, Hualapai Peak, Lake Havasu
City, Vidal Junction, Moapa, Golden Valley, South Cove, Yucca Valley,
Yucca, Bullhead City, Barstow, Mountain Pass, Primm, Laughlin,
Needles, Fort Irwin, Desert Rock, Amargosa Valley, Hoover Dam, North
Las Vegas, Boulder City, Las Vegas, Stovepipe Wells, Desert Hills,
Kingman, Mesquite, Baker, Furnace Creek, Pahrump, Twentynine Palms,
Mitchell Caverns, Searchlight, Shoshone, Topock, Dolan Springs,
Overton, Daggett, and Morongo Valley
1029 AM PDT Tue Aug 25 2026 /1029 AM MST Tue Aug 25 2026/
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT / MST
FRIDAY...
* WHAT...Dangerously hot conditions expected through the work week,
with temperatures up to 115 to 118 across Death Valley and the
Colorado River Valley; up to 108 to 112 across Moapa Valley, the
Las Vegas Valley, the Pahrump Valley, and the Morongo Valley; up to
90 to 95 in the Hualapai Mountains. Overnight lows will be in the
upper-80s to low-90s for desert valleys.
* WHERE...Portions of northwest Arizona, southeast California, and
southern Nevada.
* WHEN...Until 8 PM PDT / 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.
&&
$$
JCS
Red Flag Warning
URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
906 AM PDT Tue Aug 25 2026
...RED FLAG WARNING IN EFFECT FROM 10 AM TODAY TO 3 PM FRIDAY FOR
MANY INTERIOR PORTIONS OF SOUTHWEST CALIFORNIA DUE TO EXTREME
HEAT AND INSTABILITY ALONG WITH LOCALLY GUSTY WINDS AND LOW
HUMIDITIES...
.A very hot and unstable air mass combined with locally gusty
winds and low humidities will bring a significant risk of large
plume dominated fires with rapid spread and extreme fire
behavior.
CAZ238-345-353-376>379-252300-
/O.CON.KLOX.FW.W.0003.260825T1700Z-260828T2200Z/
Cuyama Valley-San Luis Obispo County Mountains-
Santa Barbara County Interior Mountains-
Southern Ventura County Mountains-
Northern Ventura County Mountains-Interstate 5 Corridor-
Western San Gabriel Mountains and Highway 14 Corridor-
906 AM PDT Tue Aug 25 2026
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 3 PM PDT FRIDAY FOR
EXTREME HEAT AND INSTABILITY ALONG WITH LOCALLY GUSTY WINDS AND
LOW HUMIDITIES FOR THE INTERIOR MOUNTAINS AND ADJACENT FOOTHILLS
OF LOS ANGELES, VENTURA, SANTA BARBARA, AND SAN LUIS OBISPO
COUNTIES, AND CUYAMA VALLEY...
* TEMPERATURES...Highs 98 to 108 across the lower mountains,
adjacent foothills and Cuyama Valley, and 85 to 95 across higher
mountains. Lows in the mid 70s to mid 80s common in the
mountains and foothills.
* INSTABILITY...Very deep mixing heights of 12,000 to 20,000 feet
today through Thursday, slightly lower on Friday.
* WINDS...Local northwest to north winds 15 to 25 mph with gusts
up to 35 mph at times, strongest across the I-5 and Highway 33
corridors. A slightly stronger northerly wind push is possible
late Thursday night into Friday morning, with gusts up to 40
mph possible across the I-5 corridor.
* RELATIVE HUMIDITY...Minimum humidities 10 to 20 percent each
day, with isolated values as low as 8 percent Wednesday through
Friday. Poor recoveries overnight hours in the mountains and
foothills with humidities in the 15 to 30 percent range.
* IMPACTS...There is a significant risk of large plume dominated
fires with rapid fire spread and extreme fire behavior. There
is a history of large plume dominated fires this time of year
with similar weather and fuel conditions, including the
Bridge, Bobcat, and Station fires.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
will occur shortly. Use extreme caution with anything that can
spark a wildfire. Residents near wildland interfaces should be
prepared to evacuate if a wildfire breaks out. See
readyforwildfire.org and wildfirerisk.org for information.
&&
$$
Heat Advisory
URGENT - WEATHER MESSAGE
National Weather Service Hanford CA
1137 AM PDT Tue Aug 25 2026
CAZ304>316-260300-
/O.CON.KHNX.HT.Y.0005.000000T0000Z-260827T0600Z/
Coalinga - Avenal-West Side of Fresno and Kings Counties-
Caruthers - San Joaquin - Selma-Fresno-Clovis-West Side Mountains
South of 198-Buttonwillow - Lost Hills - I5-Delano-Wasco-Shafter-
Hanford - Corcoran - Lemoore-Visalia - Porterville - Reedley-
Buena Vista-Bakersfield-Southeast San Joaquin Valley-South End
San Joaquin Valley-
Including the cities of Coalinga, Lamont, Buttonwillow, McKittrick,
Delano, Wasco, Goshen, Fresno, Visalia, Kettleman City, Taft, Five
Points, Tulare, Selma, Sanger, Hanford, Shafter, Lemoore, Arvin,
Corcoran, Bakersfield, Lost Hills, Richgrove, Parlier, Kerman,
Blackwells Corner, Lemoore Station, Porterville, Avenal, Alpaugh, and
Kingsburg
1137 AM PDT Tue Aug 25 2026
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 11 PM PDT WEDNESDAY...
* WHAT...High temperatures up to 104 degrees expected. Moderate to
Major Heat Risk is expected at this time.
* WHERE...Southern San Joaquin Valley and West Side Hills of the
Coastal Range.
* WHEN...Until 11 PM PDT Wednesday.
* IMPACTS...Hot temperatures may cause heat illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
&&
$$
BB
URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
1042 AM PDT Tue Aug 25 2026
CAZ341-347-348-280300-
/O.CON.KLOX.HT.Y.0015.260826T1700Z-260828T0300Z/
San Luis Obispo County Inland Central Coast-Santa Barbara County
Inland Central Coast-Santa Ynez Valley-
Including the cities of Solvang, Lake Cachuma, San Luis Obispo, Santa
Ynez, Lopez Lake, Nipomo, Los Olivos, Santa Maria, and Buellton
1042 AM PDT Tue Aug 25 2026
...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM WEDNESDAY TO 8 PM PDT
THURSDAY...
* WHAT...Temperatures up to 99 expected.
* WHERE...San Luis Obispo County Inland Central Coast, Santa Barbara
County Inland Central Coast, and Santa Ynez Valley.
* WHEN...From 10 AM Wednesday to 8 PM PDT Thursday.
* IMPACTS...Hot temperatures may cause heat illnesses.
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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
1042 AM PDT Tue Aug 25 2026
CAZ342>345-290300-
/O.CON.KLOX.HT.Y.0014.000000T0000Z-260829T0300Z/
Santa Lucia Mountains-Southern Salinas Valley-San Luis Obispo
County Interior Valleys-San Luis Obispo County Mountains-
Including the cities of Santa Margarita Lake, Shandon, La Panza
Range, Atascadero, San Miguel, Carrizo Plain, Creston, Lake
Nacimiento, Paso Robles, Templeton, Caliente Range, Hearst Castle,
and Irish Hills
1042 AM PDT Tue Aug 25 2026
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY...
* WHAT...Temperatures up to 105.
* WHERE...San Luis Obispo County Interior Valleys, San Luis Obispo
County Mountains, Santa Lucia Mountains, and Southern Salinas
Valley.
* WHEN...Until 8 PM PDT Friday.
* IMPACTS...Hot temperatures may cause heat illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
$$
Small Craft Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
832 AM PDT Tue Aug 25 2026
PZZ565-252345-
/O.CON.KMTR.SC.Y.0099.260825T2200Z-260827T1600Z/
Coastal Waters from Point Pinos to Point Piedras Blancas
California out to 10 NM-
832 AM PDT Tue Aug 25 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 3 PM THIS
AFTERNOON TO 9 AM PDT THURSDAY...
* WHAT...Northwest winds 10 to 20 kt with gusts up to 30 kt
expected.
* WHERE...Coastal Waters from Point Pinos to Point Piedras
Blancas California out to 10 NM.
* WHEN...From 3 PM this afternoon to 9 AM PDT Thursday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
For more information from the National Weather Service visit
http://weather.gov/sanfrancisco
URGENT - MARINE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
702 AM PDT Tue Aug 25 2026
PZZ645-260000-
/O.CON.KLOX.SC.Y.0120.260825T2200Z-260826T1000Z/
Point Piedras Blancas to Point Sal westward out to 10 NM-
702 AM PDT Tue Aug 25 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 3 PM THIS
AFTERNOON TO 3 AM PDT WEDNESDAY...
* WHAT...Hazardous sea conditions.
* WHERE...Point Piedras Blancas to Point Sal westward out to 10
NM.
* WHEN...From 3 PM Tuesday to 3 AM PDT Wednesday.
* IMPACTS...Conditions will be hazardous to small craft.
* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX)
for more.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
702 AM PDT Tue Aug 25 2026
PZZ670-260000-
/O.EXT.KLOX.SC.Y.0119.260825T1402Z-260827T1000Z/
Point Piedras Blancas to Point Sal from 10 to 60 NM-
702 AM PDT Tue Aug 25 2026
...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 AM PDT THURSDAY...
* WHAT...Hazardous sea conditions.
* WHERE...Point Piedras Blancas to Point Sal from 10 to 60 NM.
* WHEN...Until 3 AM PDT Thursday.
* IMPACTS...Conditions will be hazardous to small craft.
* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX)
for more.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
702 AM PDT Tue Aug 25 2026
PZZ673-676-260000-
/O.CON.KLOX.SC.Y.0117.000000T0000Z-260827T1000Z/
Waters from Pt. Sal to Santa Cruz Island CA and westward 60 nm
including San Miguel and Santa Rosa Islands-
Outer waters from Santa Cruz Island to San Clemente Island to
60 NM offshore including San Nicolas and Santa Barbara Islands-
702 AM PDT Tue Aug 25 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT
THURSDAY...
* WHAT...Hazardous sea conditions.
* WHERE...Waters from Pt. Sal to Santa Cruz Island CA and
westward 60 nm including San Miguel and Santa Rosa Islands and
Outer waters from Santa Cruz Island to San Clemente Island to
60 NM offshore including San Nicolas and Santa Barbara Islands.
* WHEN...Until 3 AM PDT Thursday.
* IMPACTS...Conditions will be hazardous to small craft.
* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX)
for more.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
Air Quality Alert
CAC047-271800-
Merced-
1108 AM PDT Tue Aug 25 2026
...The Valley Air District has issued an Air Quality Alert for
Merced County from Tuesday morning through Thursday morning due
to smoke from a local fire...
Exposure to particle pollution can cause serious health problems;
aggravate lung disease, cause asthma attacks and acute bronchitis
and increase risk of respiratory infections. In people with heart
disease, short-term exposure to particle pollution has been linked
to heart attacks and arrhythmias according to the US
Environmental Protection Agency. Children and elderly people are
also more susceptible to consequences of high particulate levels.
Stay indoors if possible. Avoid prolonged or strenuous outdoor
physical activities to reduce the affect of unhealthy air. For
current air quality go to fire.airnow.gov
&&
$$
BB
CAZ373-380-378-368-548-088-375-372-379-290300-
Eastern San Fernando Valley-
Including the cities of Burbank, Glendale, and Universal City
Eastern San Gabriel Mountains-
Interstate 5 Corridor-
Los Angeles County Inland Coast including Downtown Los Angeles-
Including the cities of Inglewood, Downey, Norwalk, Beverly Hills,
and West Hollywood
Los Angeles County San Gabriel Valley-
Including the cities of Pasadena, San Gabriel, and Pomona
Santa Clarita Valley-
Including the cities of Santa Clarita, Newhall, and Valencia
Santa Susana Mountains-
Western San Fernando Valley-
Including the cities of Reseda, Woodland Hills, and Northridge
Western San Gabriel Mountains and Highway 14 Corridor-
755 AM PDT Tue Aug 25 2026
...AIR QUALITY ALERT FOR HARMFUL LEVELS OF OZONE (SMOG) AIR
POLLUTION...
* WHAT...The South Coast AQMD has issued an air quality alert due to
harmful levels of ozone pollution.
Visit https://www.aqmd.gov/alertinfo to check current and forecasted
air quality levels.
* WHERE...in the the South Coast Air Basin and Coachella Valley.
Levels of ozone pollution can vary by time and location depending on
emissions and air pollution transport.
* WHEN...from 1 PM Monday to 8 PM Friday. The highest ozone levels
typically occur in the afternoon and early-evening hours.
* IMPACTS... Ozone air pollution can cause serious health problems,
including trouble breathing, asthma attacks, and lung damage.
Everyone can be affected, but sensitive groups such as people with
lung disease, older adults, people who are pregnant, children, and
those who spend a lot of time outdoors are at greater risk.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To protect your health, check air quality levels and act as needed:
* When Air Quality Index (AQI) levels are "Unhealthy for
Sensitive Groups" (orange), sensitive groups as specified
above should limit extended or intense outdoor activity.
* When AQI is "Unhealthy" (red), everyone may experience health
impacts. Sensitive groups should avoid extended time outdoors.
* When AQI is "Very Unhealthy" (purple), sensitive groups should
avoid all outdoor physical activity. Everyone else should
avoid extended or intense outdoor activity.
* When AQI is "Hazardous" (maroon), everyone should avoid all
outdoor physical activity.
* ADDITIONAL DETAILS...
To help keep indoor air clean when air quality is poor:
* Keep windows and doors closed
* Run your air conditioner and/or an air purifier
* Do not use whole house fans or swamp coolers that bring in
outside air if you have other methods to stay cool
* Avoid other sources of pollution such as fireplaces, candles,
incense, and grilling
To help minimize outdoor ozone air pollution levels:
* Limit the use of gasoline powered lawn and garden equipment
until evening hours
* Try to delay trips to the gas station and the use of household
chemicals until the evening
$$
