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California alert stream

11 active alerts right now, 8 severe or extreme. Weather, flood, heat, fire, wind, marine, air and quakes from NWS, USGS and Open-Meteo, refreshed every 10 minutes.

Air quality (state centre)88Moderate
Severe or extreme8
Counties affected0
FeedsJSON · RSS
Scenic view of Sacramento's skyline with dramatic clouds in the background, highlighting the transitional weather.
Photo: Stephen Leonardi / Pexels

Active alerts

Newest and most severe first. Source on every card.

SevereExtreme heatends 2026-10-09

Extreme Heat Warning · San Diego County Inland Valleys

Extreme Heat Warning issued October 1 at 12:29AM PDT until October 8 at 8:00PM PDT by NWS San Diego CA

What to do

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.

MissionCar-free day: walk, bus or stay home while it is hotA 10 km round trip left undriven avoids ~2 kg CO₂e (EPA 404 g/mile), and keeps you off a hot road. · on ClimateChallenge.com
NWS San Diego CASource →
SevereExtreme heatends 2026-10-09

Extreme Heat Warning · Orange County Coastal

Extreme Heat Warning issued October 1 at 12:29AM PDT until October 8 at 8:00PM PDT by NWS San Diego CA

What to do

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.

MissionCar-free day: walk, bus or stay home while it is hotA 10 km round trip left undriven avoids ~2 kg CO₂e (EPA 404 g/mile), and keeps you off a hot road. · on ClimateChallenge.com
NWS San Diego CASource →
SevereExtreme heatends 2026-10-09

Extreme Heat Warning · Santa Ana Mountains and Foothills

Extreme Heat Warning issued October 1 at 12:29AM PDT until October 8 at 8:00PM PDT by NWS San Diego CA

What to do

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.

MissionCar-free day: walk, bus or stay home while it is hotA 10 km round trip left undriven avoids ~2 kg CO₂e (EPA 404 g/mile), and keeps you off a hot road. · on ClimateChallenge.com
NWS San Diego CASource →
SevereExtreme heatends 2026-10-09

Extreme Heat Warning · San Diego County Coastal Areas

Extreme Heat Warning issued October 1 at 12:29AM PDT until October 8 at 8:00PM PDT by NWS San Diego CA

What to do

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.

MissionCar-free day: walk, bus or stay home while it is hotA 10 km round trip left undriven avoids ~2 kg CO₂e (EPA 404 g/mile), and keeps you off a hot road. · on ClimateChallenge.com
NWS San Diego CASource →
SevereExtreme heatends 2026-10-09

Extreme Heat Warning · San Bernardino and Riverside County Valleys-The Inland Empire

Extreme Heat Warning issued October 1 at 12:29AM PDT until October 8 at 8:00PM PDT by NWS San Diego CA

What to do

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.

MissionCar-free day: walk, bus or stay home while it is hotA 10 km round trip left undriven avoids ~2 kg CO₂e (EPA 404 g/mile), and keeps you off a hot road. · on ClimateChallenge.com
NWS San Diego CASource →
SevereExtreme heatends 2026-10-09

Extreme Heat Warning · Orange County Inland

Extreme Heat Warning issued October 1 at 12:29AM PDT until October 8 at 8:00PM PDT by NWS San Diego CA

What to do

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.

MissionCar-free day: walk, bus or stay home while it is hotA 10 km round trip left undriven avoids ~2 kg CO₂e (EPA 404 g/mile), and keeps you off a hot road. · on ClimateChallenge.com
NWS San Diego CASource →
SevereExtreme heatends 2026-10-09

Extreme Heat Watch · 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

Extreme Heat Watch issued September 30 at 9:46AM PDT until October 8 at 8:00PM PDT by NWS Los Angeles/Oxnard CA

What to do

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.

MissionCar-free day: walk, bus or stay home while it is hotA 10 km round trip left undriven avoids ~2 kg CO₂e (EPA 404 g/mile), and keeps you off a hot road. · on ClimateChallenge.com
NWS Los Angeles/Oxnard CASource →
SevereExtreme heatends 2026-10-09

Extreme Heat Watch · Cuyama Valley; Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains; Santa Cruz and Anacapa Islands

Extreme Heat Watch issued September 30 at 9:46AM PDT until October 8 at 8:00PM PDT by NWS Los Angeles/Oxnard CA

What to do

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.

MissionCar-free day: walk, bus or stay home while it is hotA 10 km round trip left undriven avoids ~2 kg CO₂e (EPA 404 g/mile), and keeps you off a hot road. · on ClimateChallenge.com
NWS Los Angeles/Oxnard CASource →
MinorFloodingends in 9 h

Coastal Flood Advisory · San Francisco; North Bay Interior Valleys; San Francisco Bay Shoreline; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast

Coastal Flood Advisory issued September 30 at 3:46PM PDT until October 1 at 5:00PM PDT by NWS San Francisco CA

What to do

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.

MissionSandbag, check a drain, or clear a storm grate near youBlocked street drains are the top cause of nuisance street flooding. One cleared grate protects a block. · on ClimateChallenge.com
NWS San Francisco CASource →
MinorEarthquakesends in 6 h

Earthquake M3.0 · 8 km ESE of Cloverdale, CA

M 3.0 - 8 km ESE of Cloverdale, CA

MissionStrap one tall piece of furniture to a wallFalling furniture is the leading cause of earthquake injuries indoors (USGS). · on ClimateChallenge.com
MinorEarthquakesends in 6 h

Earthquake M2.6 · 1 km SW of Anderson Springs, CA

M 2.6 - 1 km SW of Anderson Springs, CA

MissionStrap one tall piece of furniture to a wallFalling furniture is the leading cause of earthquake injuries indoors (USGS). · on ClimateChallenge.com

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