Extreme Heat Warning
URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
940 PM PDT Sat Oct 3 2026
CAZ043-041315-
/O.CON.KSGX.XH.W.0010.000000T0000Z-261009T0300Z/
San Diego County Coastal Areas-
Including the cities of National City, Vista, Carlsbad, Oceanside,
Chula Vista, San Diego, and Encinitas
940 PM PDT Sat Oct 3 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THURSDAY...
* WHAT...Dangerously hot conditions with high temperatures ranging
from the mid 80s to mid 90s at the beaches to the mid 90s to low
100s for the mesas. Nights will be very warm with low temperatures
mostly in the 70s.
* WHERE...San Diego County Coastal Areas.
* WHEN...Until 8 PM PDT Thursday.
* 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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
940 PM PDT Sat Oct 3 2026
CAZ048-041315-
/O.CON.KSGX.XH.W.0010.000000T0000Z-261009T0300Z/
San Bernardino and Riverside County Valleys-The Inland Empire-
Including the cities of San Bernardino, Corona, Ontario, Rancho
Cucamonga, Fontana, Moreno Valley, and Riverside
940 PM PDT Sat Oct 3 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THURSDAY...
* WHAT...Dangerously hot conditions with high temperatures in the
upper 90s to 103 and warm nights with low temperatures in the low
to mid 70s expected.
* WHERE...San Bernardino and Riverside County Valleys-The Inland
Empire.
* WHEN...Until 8 PM PDT Thursday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
940 PM PDT Sat Oct 3 2026
CAZ050-041315-
/O.CON.KSGX.XH.W.0010.000000T0000Z-261009T0300Z/
San Diego County Valleys-
Including the cities of Poway, Santee, San Marcos, La Mesa, El Cajon,
and Escondido
940 PM PDT Sat Oct 3 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THURSDAY...
* WHAT...Dangerously hot conditions with high temperatures in the
upper 90s to 103 and warm nights with low temperatures in the lower
to mid 70s expected.
* WHERE...San Diego County Valleys.
* WHEN...Until 8 PM PDT Thursday.
* 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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
940 PM PDT Sat Oct 3 2026
CAZ057-041315-
/O.CON.KSGX.XH.W.0010.000000T0000Z-261009T0300Z/
Santa Ana Mountains and Foothills-
940 PM PDT Sat Oct 3 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THURSDAY...
* WHAT...Dangerously hot conditions with temperatures up to 100 and
warm nights with lows in the low to mid 70s.
* WHERE...Santa Ana Mountains and Foothills.
* WHEN...Until 8 PM PDT Thursday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
940 PM PDT Sat Oct 3 2026
CAZ552-041315-
/O.CON.KSGX.XH.W.0010.000000T0000Z-261009T0300Z/
Orange County Coastal Areas-
Including the cities of Costa Mesa and Huntington Beach
940 PM PDT Sat Oct 3 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THURSDAY...
* WHAT...Dangerously hot conditions with high temperatures ranging
from the mid 80s to low 90s at the beaches to the mid 90s to around
100 for inland coastal areas expected. Nights will be very warm
with low temperatures in the low to mid 70s.
* WHERE...Orange County Coastal Areas.
* WHEN...Until 8 PM PDT Thursday.
* 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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
940 PM PDT Sat Oct 3 2026
CAZ554-041315-
/O.CON.KSGX.XH.W.0010.000000T0000Z-261009T0300Z/
Orange County Inland Areas-
Including the cities of Anaheim, Santa Ana, Garden Grove, Orange,
Irvine, Mission Viejo, and Fullerton
940 PM PDT Sat Oct 3 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THURSDAY...
* WHAT...Dangerously hot conditions with high temperatures in the mid
90s to 105 and warm nights with low temperatures in the 70s
expected.
* WHERE...Orange County Inland Areas.
* WHEN...Until 8 PM PDT Thursday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
&&
$$
SS
URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
1215 PM PDT Sat Oct 3 2026
CAZ087-088-354>358-362-366>375-548-080300-
/O.CON.KLOX.XH.W.0008.000000T0000Z-261009T0300Z/
Catalina and Santa Barbara Islands-Santa Clarita Valley-Ventura
County Beaches-Ventura County Inland Coast-Lake Casitas-Ojai
Valley-Central Ventura County Valleys-Malibu Coast-Los Angeles
County Beaches-Palos Verdes Hills-Los Angeles County Inland Coast
including Downtown Los Angeles-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-Los Angeles County San Gabriel Valley-
Including the cities of Pacific Palisades, Hollywood, Santa Clarita,
Westlake Village, La Canada Flintridge, Newhall, Pasadena, Thousand
Oaks, Beverly Hills, Ventura, Compton, Torrance, Lake Castaic,
Downey, Meiners Oaks, Piru, Long Beach, Sunland, Simi Valley, El
Monte, Malibu Bowl, Redondo Beach, Avalon, Malibu Lake, Northridge,
Burbank, Van Nuys, Culver City, East Ventura, Norwalk, Ojai, Topanga,
Camarillo, Malibu, San Gabriel, Port Hueneme, Valencia, Newbury Park,
Santa Monica, Point Mugu, East Los Angeles, Fillmore, Santa Paula,
Woodland Hills, Universal City, Pomona, Rancho Palos Verdes, Oxnard,
Glendale, Moorpark, Chatsworth, Oat Mountain, LAX, and Oak View
1215 PM PDT Sat Oct 3 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THURSDAY...
* WHAT...Dangerously hot conditions with temperatures up to 90 at the
coast and 105 in the valleys.
* WHERE...Coast and valleys of Los Angeles and Ventura Counties.
* WHEN...Until 8 PM PDT Thursday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Very hot temperatures are likely to continue
into the second week of October, possibly requiring an extension of
this product.
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.
&&
$$
Air Quality Alert
CAZ378-088-375-379-050345-
Interstate 5 Corridor-
Santa Clarita Valley-
Including the cities of Santa Clarita, Newhall, and Valencia
Santa Susana Mountains-
Western San Gabriel Mountains and Highway 14 Corridor-
835 PM PDT Sat Oct 3 2026
...AIR QUALITY ALERT FOR HARMFUL FINE PARTICLE POLLUTION LEVELS DUE
TO WILDFIRE SMOKE...
* WHAT...The South Coast AQMD has issued an air quality alert due to
increased fine particle pollution from wildfire smoke.
Visit https://www.aqmd.gov/alertinfo to check current and forecasted
air quality levels.
* WHERE...in the Santa Clarita Valley, the I-5 corridor, and the
Angeles National Forest. Levels of particle pollution can vary by
time and location depending on fire activity and local weather
conditions.
* WHEN...8 PM Saturday until 8 PM Sunday.
* IMPACTS...Particles in wildfire smoke can get deep into the lungs
and cause serious health problems such as heart attacks, strokes,
asthma attacks, and difficulty breathing. Everyone can be affected,
but people with lung or heart disease, older adults, people who are
pregnant, children, and those who spend a lot of time outdoors are
at greater risk.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To protect your health, if you smell or see smoke:
* Remain indoors with windows and doors closed
* Avoid intense outdoor physical activity
* Run your air conditioner and/or an air purifier
* If you must be outdoors, keep the time brief and wear a well-
fitting N-95 mask
* Do not use whole house fans or swamp coolers that bring in
outside air if you have other methods to stay cool
* Avoid other sources of pollution such as fireplaces, candles,
incense, grilling, and gasoline-powered lawn and garden
equipment
$$
