Los Angeles Flood Risk: Atmospheric River Threat – Christmas Alert
- California is facing a powerful storm bringing heavy rainfall, potential landslides, flooding, and strong winds.
- Upscale neighborhoods in Pacific palisades and Malibu, still recovering from wildfires in early 2025, are under increased scrutiny.
- Ariel Cohen of the National Weather Service stated on tuesday evening that mountainous areas and roads through canyons are particularly vulnerable to landslides and mudslides.
california Braces for Landslides, Flooding, and High Winds
Table of Contents
Storm Overview
California is facing a powerful storm bringing heavy rainfall, potential landslides, flooding, and strong winds. The storm is particularly concerning in areas recently impacted by wildfires, were saturated ground increases the risk of debris flows. The National Weather Service has issued warnings across the state, urging residents to take precautions.
Landslide Risk
Upscale neighborhoods in Pacific palisades and Malibu, still recovering from wildfires in early 2025, are under increased scrutiny. Heavy rainfall substantially elevates the risk of landslides in these areas. According to the Los Angeles Times, traffic congestion was already building on Wednesday as the storm intensified, with images showing vehicles stalled in heavy rain.
Ariel Cohen of the National Weather Service stated on tuesday evening that mountainous areas and roads through canyons are particularly vulnerable to landslides and mudslides. The combination of saturated ground and wind gusts exceeding 80 km/h (approximately 50 mph) also poses a threat to trees and electrical infrastructure.
Flooding Concerns
Rivers across California are at risk of overflowing their banks due to the intense rainfall. Authorities are advising against driving through affected areas of Los Angeles, a city of 3.9 million residents where car travel is predominant. The potential for debris blocking roadways is also a major concern.
Sierra Nevada Snowfall
The Sierra Nevada Mountains are expected to receive meaningful snowfall, with 30 centimeters (approximately 12 inches) already recorded this week. Snowfall is forecast to continue through Friday, possibly impacting travel and recreation in the region.
Recent Fire Impacts
The current storm is compounding the challenges faced by communities still recovering from the January 2025 wildfires. These fires resulted in 31 fatalities and the destruction of over 16,000 buildings, leaving some neighborhoods particularly susceptible to mudslides and debris flows. The California Department of forestry and Fire Protection (CAL FIRE) continues to assess the damage and provide support to affected communities.
Safety recommendations
- Heed all warnings and evacuation orders issued by local authorities.
- Avoid driving through flooded areas.
- Be aware of the potential for falling trees and power lines.
- monitor weather updates from the National Weather Service.
- Report any downed power lines or hazardous conditions to the appropriate authorities.