Faster Rainfall Rates Raise Flood Concerns in LA County

Introduction to the Storm

The storm this coming week could produce faster rainfall rates than previously expected, increasing the risk of flooding and debris flows in Los Angeles County burn scars, meteorologists warn.

“We’re now focusing most of the impacts in a 24-hour window from Monday night to Tuesday night,” said National Weather Service meteorologist Dave Gomberg. “We have to start thinking about flooding and debris flows in recent burn scars.”

Updated Forecasts and Concerns

Earlier forecasts suggested a modest, slow-moving system, but updated data show the potential for more intense bursts of rain. While overall rainfall totals are still expected to remain the same — about a half-inch to 1.5 inches in most lower elevations and up to 2 inches in the foothills — the enhanced rate of rainfall is what raises concern, said NWS meteorologist Rich Thompson.

Regional Variations in Rainfall

However, not all areas will see the same intensity. San Bernardino County, which experienced deadly flooding and debris flow weeks ago, is not expected to receive enhanced rainfall rates, according to NWS meteorologist Lauren Villafane. The agency forecasts up to about one inch in the mountain areas of the county.

Preparations and Responses

Still, the state positioned resources there ahead of the storm. In response to the heightened risk, Gov. Gavin Newsom approved the prepositioning of fire and rescue resources in San Bernardino and Imperial counties ahead of the storm, which was expected to impact the region from Thursday, Oct. 9 through Saturday, Oct. 11.
State officials said the move will allow crews to respond quickly and minimize potential impacts. Resources include four fire engines, one hand crew, one dispatcher, one loader, one bulldozer and an unmanned aircraft system with support personnel.

Local and State Cooperation

Local fire agencies are identifying at-risk areas and can request additional resources from the state, the governor’s office said in a statement. Staging locations and response assignments will be coordinated by local officials.

Public Advice and Precautions

Residents in flood-prone or burn scar areas are urged to stay alert as the storm approaches. The Governor’s Office advised Californians to prepare evacuation plans, pack go-bags with essentials, sign up for local emergency alerts, review family emergency plans and check on neighbors.

Conclusion

The potential for faster rainfall rates this coming week in LA County has raised significant concerns about flooding and debris flows, particularly in burn scar areas. With the state and local agencies prepositioning resources and advising residents to be prepared, the focus is on minimizing the impact of the storm. Residents are urged to stay vigilant and follow the advice of local authorities to ensure their safety.

FAQs

• Q: What are the expected rainfall totals for the upcoming storm in LA County?
  A: The overall rainfall totals are expected to be about a half-inch to 1.5 inches in most lower elevations and up to 2 inches in the foothills.
• Q: Which areas are of most concern for flooding and debris flows?
  A: Areas with recent burn scars in Los Angeles County are of most concern due to the potential for faster rainfall rates.
• Q: What preparations have been made by the state ahead of the storm?
  A: The state has prepositioned fire and rescue resources in San Bernardino and Imperial counties, including fire engines, hand crews, and unmanned aircraft systems.
• Q: What advice has been given to residents in flood-prone areas?
  A: Residents are advised to prepare evacuation plans, pack go-bags, sign up for local emergency alerts, review family emergency plans, and check on neighbors.
  Originally Published: October 11, 2025 at 7:22 PM PDT