California Faces Deadly Flooding and Travel Chaos as Life-Threatening Atmospheric River Storm Hits Los Angeles, San Francisco, and Beyond

Published on December 27, 2025

California, the state known for its sunshine and pleasant weather, is facing a life-threatening atmospheric river storm that has led to widespread flooding, travel chaos, and hazardous conditions from Los Angeles to San Francisco. This weather event, one of the strongest atmospheric rivers of the year, has caused significant disruptions to everyday life, forcing evacuations, causing fatalities, and leaving thousands of travelers stranded as airports and highways become inundated with water.

As of December 26, 2025, the storm continues to wreak havoc across the Golden State, with flash floods, mudslides, and record-breaking rainfall being reported in various counties. While the storm primarily affects Southern California, the intense rainfall has also extended north, creating dangerous conditions along the entire coast. Travel is currently disrupted with widespread flight cancellations and road closures affecting both locals and tourists.

The Force of Nature: How Atmospheric Rivers Cause Catastrophic Storms

Atmospheric rivers, which are long, narrow bands of concentrated moisture, transport vast amounts of water from the Pacific Ocean to land. These “rivers in the sky” carry moisture equivalent to several times the flow of the Mississippi River, and when they collide with the steep mountains of California, they often release this moisture as intense rainfall or snow. These storms are particularly dangerous in areas where the terrain is susceptible to flooding and mudslides, such as Los Angeles County and the San Gabriel Mountains.

This current storm is no exception. Over 11 inches (280 mm) of rain have fallen in some areas of Los Angeles County, while the Sierra Nevada has seen a massive snow dump that could lead to avalanches and severe winter driving hazards.

According to the National Weather Service (NWS) and the California Department of Emergency Management, the state of emergency declared by Governor Gavin Newsom covers at least six counties in Southern California, including Los Angeles, Santa Barbara, and San Bernardino. These counties are experiencing flooding in their streets, with floodwaters quickly reaching unsafe levels.

Travel Chaos: Los Angeles and San Francisco Disruptions and Warnings

For travelers, the storm has created a nightmare scenario. Major airports in Los Angeles, San Francisco, and San Jose are facing flight delays and cancellations as the rain causes low visibility, flooding on runways, and high winds. Passengers at Los Angeles International Airport (LAX) have reported long delays as crews work to de-ice and clear flooded sections of the airport.

• LAX has experienced dozens of flight cancellations, with airlines including Delta, American Airlines, and Southwest struggling to keep up with the demand and the weather. Travelers are advised to check their flight status before heading to the airport.
• San Francisco International Airport (SFO) is also heavily impacted by the storm, with nearly 100 flights canceled and multiple delays due to flooded terminals and dangerous winds.

In addition to air travel, the California highway system is also facing significant disruptions. Interstate 5, one of the state’s major travel routes, is currently closed in Los Angeles County due to flooding. Several roads in the San Fernando Valley and Santa Clara County have also been closed due to mudslides.

For tourists planning to travel, it is crucial to be aware of road closures and weather-related delays. Travelers are advised to consult the California Department of Transportation (Caltrans) website and the California Highway Patrol (CHP) for real-time updates.

Mass Evacuations and Ongoing Risks in Flood-Prone Areas

As rain continues to fall, authorities have issued evacuation orders for residents in flood-prone areas, particularly those near rivers and creeks in Southern California. Over 130 evacuation orders were issued in Los Angeles County, especially for areas that have been impacted by previous wildfires where the soil has become unstable.

In some parts of the Santa Barbara area, rising floodwaters have prompted rescue teams to evacuate dozens of stranded residents. The National Guard has been mobilized to assist with search and rescue operations.

Power outages are another major issue, with tens of thousands of homes in Los Angeles, San Francisco, and Santa Clara left without electricity due to downed power lines and flooded transformer stations.

The Human Toll: Fatalities and Injuries Across the State

Unfortunately, the toll on human life has already begun to rise. At least three deaths have been confirmed in Southern California, including a tragic incident involving a driver who was trapped in floodwaters in Orange County. Another fatality occurred in San Francisco as a result of a fallen tree.

In addition to fatalities, there have been numerous injuries related to accidents caused by flash floods and mudslides, further straining the state’s emergency resources.

Local hospitals are under immense pressure as the situation unfolds, with several critical cases being admitted due to weather-related injuries.

What Tourists Need to Know and What They Can Do

For tourists planning to visit California over the holiday season, here’s what you need to know:

1. Delays and Cancellations: Flight cancellations and delays are likely to continue, especially as the storm impacts airports in Los Angeles, San Francisco, and San Jose. Always check with your airline for flight status.
2. Road Safety: Avoid driving in rain-soaked roads, especially in mountainous areas prone to mudslides. Highway closures are frequent due to flooding and landslides. If you’re in affected areas, stay indoors and follow local emergency alerts.
3. Evacuation Warnings: If you’re in an evacuation zone, follow the instructions from local authorities. The California Office of Emergency Services is providing updates through its website and social media channels.
4. Power Outages: Many areas are experiencing power outages. Make sure to have a backup plan and keep your devices charged. Use battery-powered lights and stay updated via the Californian emergency mobile app.

Preparing for the Future: California’s Fight Against Extreme Weather

This atmospheric river storm is just one example of how climate change is exacerbating weather extremes in California. Scientific studies show that the state will continue to experience more frequent and intense storms, including atmospheric rivers, in the coming years.

In response, the state is investing in infrastructure improvements such as flood barriers, better storm drainage systems, and increased wildfire prevention efforts to mitigate the impacts of future storms.

Conclusion: Stay Safe, Stay Informed

As California braces for further rain and extreme weather conditions, travelers and residents alike are urged to take the storm seriously. Stay informed through trusted sources like the National Weather Service, Caltrans, and local emergency management websites.

By heeding evacuation orders, monitoring the weather, and staying safe indoors, you can minimize the risks posed by this life-threatening atmospheric river storm. Let’s hope the storm will soon pass, but for now, safety is the top priority.