Communities across the Southland experienced renewed impacts from an atmospheric river–fed system that moved through the region on Dec. 25, producing widespread heavy showers and prompting flash-flood and flood advisories for low-lying and burn-scar areas.

Local news crews reported streets inundated with water, numerous reports of downed trees and branches, and multiple power outages as utility companies worked to assess and restore service. Video coverage from regional broadcasters showed flooded roadways and emergency responders navigating water-logged streets while advising residents to avoid nonessential travel.

Scope of the storm and forecasts

Forecasters described the event as a powerful second storm to strike Southern California during the holiday period, capable of dumping another 1–3 inches of rain in many coastal and valley locations and higher amounts in favored orographic zones and mountains where runoff and debris flows pose an elevated threat.

Meteorologists warned that burn-scarred slopes — where vegetation was removed by recent wildfires — remain especially vulnerable to dangerous debris flows if heavy, concentrated rainfall occurs, and urged residents in those zones to follow evacuation guidance where issued.

Impacts reported

• Flooded streets and travel disruptions across Los Angeles and surrounding counties, with multiple instances of vehicles stranded in high water.
• Numerous reports of downed trees and branches that blocked roads and damaged property, contributing to local power outages.
• Power utilities reporting outages and crews mobilizing to make repairs amid continuing rain and hazardous working conditions.
• Evacuation warnings and advisories issued in some vulnerable communities, particularly those below recent wildfire burn scars.

Public safety advice and response

Emergency managers reiterated standard safety precautions: avoid driving through flooded roadways, heed road closures and evacuation orders, and give utility repair crews space to work. Officials also advised residents to prepare for localized power interruptions and to check on neighbors who may be especially vulnerable.

State and local public safety agencies remained on alert and coordinated responses to high-priority incidents, including road rescues and rapid removal of hazards to restore access for emergency vehicles.

What to expect next

Forecasts indicated the possibility of continued rainfall as the storm system moves eastward, with additional precipitation likely to taper over the following 24–48 hours. Authorities cautioned that even as the heaviest rain shifts away, lingering showers and saturated soils could prolong the risk of flash flooding and debris flows.

Travelers were advised to expect delays at roads and airports and to check with airlines and local transportation agencies for updates. Motorists were urged to reduce speed in heavy rain, allow extra following distance, and avoid standing water.