Emergency stabilisation in Los Angeles after wildfires
The US Department of Agriculture’s Forest Service has reported that science-led teams were deployed to reduce the risk of flooding and landslides following the 2025 wildfires in Southern California.
According to the Forest Service, its Rocky Mountain Research Station and the University of Idaho worked on immediate post-fire recovery in Los Angeles, applying emergency stabilisation techniques to protect people and property.
It explained that Burned Area Emergency Response (BAER) teams assessed the Eaton and Palisades Fire zones using erosion modelling to decide whether to treat hillslopes with measures such as mulching to reduce soil loss and sedimentation.
Eric Nicita, regional coordinator for the BAER Team, said: “Erosion modelling for the Eaton Fire and all other fires guided decisions on whether to implement land treatments, such as mulching hillslopes, to reduce erosion and the subsequent sedimentation.”
The Forest Service added that BAER teams prescribe emergency treatments to protect critical resources, using mapping and modelling to assess soil and watershed conditions after major fires.
Mapping fire severity and soil impacts
The Forest Service stated that its teams used the Soil Burn Severity Guidebook to generate maps for each fire site, which were then applied to watershed models.
It added that these models predicted erosion, flooding and sedimentation outcomes for affected hillslopes and catchments.
According to the organisation, agencies including California’s Watershed Emergency Response Team, the California Geological Survey and Los Angeles County also used the Forest Service’s Water Erosion Prediction Product suite of tools.
The California Department of Forestry and Fire Protection Watershed Protection Program ran models for each burned hillslope to create risk maps, the Forest Service reported.
It explained that these maps identified the highest-risk areas, which were then prioritised for treatment through mulching or drainage interventions to reduce flooding and landslide risk.
Forest Service research engineer Pete Robichaud said: “Our tools are being used in meaningful decision making for understanding hillslope and watershed responses and provide guidance on where to take action that will make a difference.”
Preventative actions in Los Angeles County
The Forest Service reported that Los Angeles County implemented physical protection measures in flood-prone areas, based on research and modelling results.
It explained that local authorities cleared debris basins and installed temporary barriers, including k-rail, sandbags and muscle walls, to prevent water surges from damaging communities.
According to the Forest Service, these measures were tested during a rainstorm on 13 February and helped to prevent further damage in vulnerable areas.
Don Lindsay of the California Geological Survey said: “To my knowledge, the work the County did was effective in minimising damages to public and private property during the February 13th rain event.”
The Forest Service confirmed that these methods continue to form part of its wider response to managing post-wildfire threats in the region.
Public access to scientific tools
The Forest Service noted that the Water Erosion Prediction Product suite of tools is publicly available for agencies and community groups.
It added that online tutorials are provided to assist users in applying these models for risk planning and emergency mitigation.
The organisation explained that the tools produce detailed analyses of soil burn severity and erosion potential, supporting data-driven decisions after wildfire events.
It stated that public accessibility enables counties and agencies to plan protective actions that can reduce further damage following fires.
The Forest Service indicated that this availability allows wider community preparedness and stronger collaborative responses across jurisdictions.
The role of science in wildfire recovery
According to the Forest Service, science-based assessment is essential to address risks that arise after fires are extinguished.
It said that while fire suppression draws most attention, the subsequent stabilisation work is equally important to reduce loss during subsequent storms.
It explained that preventive measures include forest thinning, prescribed burning and, after wildfires, rapid analysis to prevent runoff and landslides.
The organisation stated that its approach applies research to limit damage and maintain safety during post-fire recovery.
It added that integrating these methods has proven to be effective in the Southern California wildfire zones in 2025.
Relevance for fire and safety professionals
For fire and safety professionals, the Forest Service’s report demonstrates how scientific tools extend beyond suppression and into recovery operations.
The work highlights how collaboration between scientists, emergency responders and local authorities can reduce secondary risks such as flooding and landslides.
It also shows how modelling tools can guide practical actions in communities, ensuring that post-fire risks are managed effectively.
These insights may inform planning, training and operational coordination in other regions facing similar wildfire threats.
Forest Service applies science to Los Angeles wildfires aftermath: Summary
The US Department of Agriculture’s Forest Service reported that it applied science-led recovery measures after wildfires in Southern California.
According to the Forest Service, Burned Area Emergency Response teams assessed burned zones with erosion models to plan emergency stabilisation.
It stated that agencies including California’s Watershed Emergency Response Team and Los Angeles County applied Forest Service modelling tools.
The California Department of Forestry and Fire Protection Watershed Protection Program created erosion risk maps for burned hillslopes.
The Forest Service said these maps helped prioritise areas for treatments such as mulching and drainage work.
Los Angeles County used the findings to clear debris basins and install temporary barriers such as k-rail and sandbags.
The Forest Service confirmed that these measures reduced damage during storms in February 2025.
It stated that its Water Erosion Prediction Product suite of tools is publicly available with tutorials for wider use.
The organisation said these tools support community preparedness and emergency response after wildfires.
It added that science-based stabilisation remains essential for recovery in wildfire-affected regions.