Burn Scar Debris Flow Information

Virtual Community Meeting - Presentation

We hosted a virtual community meeting on November 24, 2025 to share information about the Gifford and Madre Fire Burn Scars and answer questions from the public. Below is the presentation for residents who were unable to attend. 

Questions Received During the Meeting

Yes, there has been internal discussion on this topic.  County Public Works can only remove material within their right away.  Some areas require getting authority from other government agencies.  Property owners are encourage to visit Public Work’s Creek Care Guidance for more information about what they can do related to creeks and streams on their property: https://www.slocounty.ca.gov/departments/public-works/our-divisions/water-information-directory/creek-care-guidance

Public Work’s right of way varies depending on the location. 

Cal Fire is not on the call this evening, but we will reach out and ask them about this and post here when we get more information.  Generally speaking, there is work that can take place by response agencies as emergency work but it is limited in scope.  

Gifford Debris Flow Area - Are You Impacted?

Put your address in the blue "Find address or place" box at the top of the map to determine if you are within the Gifford Debris Flow Area. 

 

\Gifford Debris Flow Area Includes

 

LPZ Zones

SLC Zones

LPF-009

SLC-222

LPF-010

SLC-223

LPF-011

SLC-239

LPF-012

SLC-261

LPF-013

SLC-262

LPF-014

SLC-263

LPF-015

SLC-297

LPF-016

SLC-334B

LPF-017

SLC-336

LPF-018

SLC-337

LPF-019

 

 

Please note, if protective actions are required, they will be made for the entire Gifford Debris Flow Area.  

What is a Burn Scar? 

A recent wildfire will have lasting effects on the landscape and create an increased risk of flooding for years to come, particularly in the first two years after the wildfire. Locations downhill and downstream from burned areas are very susceptible to flash flooding and debris flows, especially near steep terrain. Rainfall that would normally be absorbed will run off extremely quickly after a wildfire, as burned soil can be as water-repellant as pavement.

Corner of fire truck during wildfire
What is a Debris Flow?

Debris flows are fast-moving, damaging and potentially deadly landslides. They are powerful mixtures of mud, rocks, boulders, entire trees - and sometimes, homes or vehicles. You'll often hear "debris flows" called "mudslides" or "mudflows." Many people use the terms interchangeably, but to scientists, each is a different kind of landslide and debris flows are the most powerful and dangerous of the three. A state WERT came to the burn scar to provide local agencies information regarding debris flow thresholds and likelihood. 

National Weather Service Debris Flow Fact Sheet

National Weather Service Flash Flood and Debris Flow Survival Guide

What's a WERT? 

From the WERT website: California Watershed Emergency Response Teams (WERTs) help communities prepare after wildfire by rapidly documenting and communicating post-fire risks to life and property posed by debris flow, flood, and rock fall hazards. The WERT response is led by the California Department of Forestry and Fire Protection (CAL FIRE) and co-led by the California Geological Survey (Department of Conservation).

The California Watershed Emergency Response Team (WERT) has identified Values at Risk (VARs), which are values or resources at risk of damage or loss by post-wildfire geologic and/or hydrologic hazards for the burn scars. County officials also worked with the WERT to identify Secondary VARs, which are areas outside of the burn scar that are also at risk for debris flow. Residents identified and in close proximity have been contacted by mail. 

WERT Website

WERT Reports and Data for Gifford Fire 

Rain Intensity Information

Rain Intensity Thresholds 

Debris flow thresholds (when debris flow may occur) determined by the WERT for the Gifford Burn Scar are: 

  • .35" or greater in 15 minutes
  • .50" or greater in 30 minutes
  • .70" or greater in 60 minutes

National Weather Service Forecasting Information

How does the NWS forecast storms? 

NWS Oxnard/Los Angeles Forecasts

Protective Actions

The County does not plan to issue protective actions - Evacuation Warning, Evacuation Order or Shelter-in-Place - in the Gifford or Madre Burn Scar areas during normal winter rain / storms.

Protective Actions will only be issued in the event of severe or life threatening storms based upon either information received via forecast by the NWS or if an event occurs without notice in the area with the potential to threaten lives. 

However, even if protective actions are not issued, residents are encouraged to leave BEFORE the rain begins if weather forecast or conditions make them uncomfortable or extra assistance would be required to leave. If debris flows occur and roads are inaccessible or destroyed, residents may be stuck in their homes until responders can safely deal with repairs.

How Will You Be Alerted? 

When the National Weather Service forecasts a significant rain event, the County will notify residents in the Gifford Debris Flow Area via AlertSLO.  It is VERY important that residents in the area sign up for these alerts so that emergency officials can communicate this information directly to them. 

How to Get Signed Up

If you are not signed up to receive messages for the burn scar areas, please visit AlertSLO.org today and select the group titled "Gifford and Madre Fire Burn Scar Information" to ensure you receive important information!

National Weather Service Notifications

The National Weather Service will send out Wireless Emergency Alerts during certain weather warnings, including Flash Flood Warnings.  These notifications are sent to all cell phones within a geographic area. You can also sign up for weather notifications in AlertSLO.org and on ReadySLO.org.

More Information

Contact Us

The County Office of Emergency Services (OES)
1055 Monterey Street D430
San Luis Obispo, CA 93408
County OES Business Line: 805-781-5678
County OES Business Email: oes@co.slo.ca.us