Hazard Report Provided By forecast.weather.gov

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
300 PM PDT Fri Aug 22 2025

CAZ038-088-342>345-348-353-369-371>383-548-231000-
/O.CON.KLOX.XH.W.0002.000000T0000Z-250825T0400Z/
Cuyama Valley-Santa Clarita Valley-Santa Lucia Mountains-Southern
Salinas Valley-San Luis Obispo County Interior Valleys-San Luis
Obispo County Mountains-Santa Ynez Valley-Santa Barbara County
Interior Mountains-Western 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-Northern
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 Rose Valley, Caliente Range, Northridge,
Templeton, Thousand Oaks, Oat Mountain, Westlake Village,
Pasadena, Pearblossom, Santa Ynez, Figueroa Mountain, Newbury
Park, Carrizo Plain, Chatsworth, Simi Valley, Malibu Bowl, Lake
Los Angeles, San Gabriel, Universal City, Lancaster, Acton,
Elizabeth Lake, Newhall, Valencia, Mount Wilson, Van Nuys,
Valyermo, Topatopa Mountains, The Angeles Crest Highway, New
Cuyama, Lake Nacimiento, Woodland Hills, Hearst Castle, Tejon
Pass, Lockwood Valley, Gorman, Mill Creek, Ozena, Big Pine
Mountain, Malibu Lake, East Los Angeles, San Miguel, Lake
Cachuma, El Monte, Burbank, San Rafael Mountain, Moorpark, Warm
Springs, Lake Palmdale, Lake Castaic, Santa Margarita Lake,
Atascadero, Solvang, Pyramid Lake, Mount Pinos, Mount Baldy,
Glendale, Llano, Pomona, Palmdale, Los Olivos, La Panza Range,
Irish Hills, Santa Clarita, Wrightwood, Creston, Paso Robles,
Matilija, La Canada Flintridge, Shandon, and Sunland
300 PM PDT Fri Aug 22 2025

...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT SUNDAY...

* WHAT...Dangerously hot daytime conditions with high temperatures
  of 95 to 110 degrees expected, and warm overnight conditions.

* WHERE...For many valleys and interior mountains of southwest
  California.

* WHEN...Until 9 PM PDT Sunday.

* IMPACTS...There is a high risk for dangerous heat illness for
  anyone, especially for the very young, the very old, those without
  air conditioning, and those active outdoors.

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.

Stay cool, stay hydrated, stay informed.

Monitor the latest forecasts and warnings for updates.

&&

$$

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
412 PM PDT Fri Aug 22 2025

...RED FLAG WARNING IN EFFECT UNTIL 9 PM PDT SATURDAY FOR AN
UNSEASONABLY HOT AND UNSTABLE AIR MASS CAPABLE OF PRODUCING
EXTREME FIRE BEHAVIOR FROM VERTICAL PLUME GROWTH... LOW RELATIVE
HUMIDITY...LOCALLY GUSTY WINDS, ISOLATED DRY LIGHTNING STRIKES,
AND CRITICALLY DRY FUELS FOR PORTIONS OF THE MOUNTAINS AND
FOOTHILLS OF LOS ANGELES, VENTURA, SANTA BARBARA, AND SAN LUIS
OBISPO COUNTIES...

.A significant heatwave and increased instability, along with
isolated dry lightning strikes and gusty outflow winds will
continue, bringing dangerous fire-weather conditions.

CAZ288-375>382-232300-
/O.CON.KLOX.FW.W.0005.000000T0000Z-250824T0400Z/
Santa Clarita Valley-Santa Susana Mountains-
Southern Ventura County Mountains-
Northern 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-
412 PM PDT Fri Aug 22 2025

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT SATURDAY FOR
AN UNSEASONABLY HOT AND UNSTABLE AIR MASS CAPABLE OF PRODUCING
EXTREME FIRE BEHAVIOR FROM VERTICAL PLUME GROWTH...LOW RELATIVE
HUMIDITY...LOCALLY GUSTY WINDS...ISOLATED DRY LIGHTNING STRIKES,
AND CRITICALLY DRY FUELS FOR PORTIONS OF THE MOUNTAINS AND
FOOTHILLS OF LOS ANGELES AND VENTURA COUNTIES...

* TEMPERATURES...Unseasonably hot high temperatures, generally
  95-110 degrees today (cooling a few degrees on Saturday),
  producing unstable conditions, with deep mixing heights of
  12,000 to 18,000 feet.

* RELATIVE HUMIDITY...Minimum relative humidity 8-20 percent,
  except 20-40 percent across higher mountains.

* THUNDERSTORMS...Isolated thunderstorms will be possible through
  the weekend, and any accompanying lightning strikes will be
  capable of starting new fires on the peripheries of rain cores.
  In addition, the environment will be favorable for strong
  downburst/outflow winds gusting 40 to 50 mph, capable of causing
  rapid fire spread. In addition, distant thunderstorms will be
  capable of bringing sudden wind shifts and increased fire-spread
  rates.

* WINDS...Outside of thunderstorms, southwest at 10-20 mph gusting
  to 20-25 mph over the western Antelope Valley Foothills and
  vicinity and in other wind- favored areas such as through passes
  and canyons. Lighter winds elsewhere.

* IMPACTS...If fire ignition occurs, conditions are favorable
  for extreme fire behavior and rapid fire growth, which could
  threaten life and property. Be aware of sudden re-direction of
  fires in response to passing outflow boundaries.

* ADDITIONAL DETAILS...Red Flag Warning headlines may eventually
  need to be extended into Sunday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that fire-weather conditions are
expected to be favorable for the development of extreme fire
behavior. 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.

&&

$$

Hazard Report Provided By forecast.weather.gov