USDA Forest Service applies science to Los Angeles wildfires recovery
Iain Hoey
Share this content
Emergency science after Los Angeles wildfires
The USDA Forest Service has reported that scientific teams were mobilised in Los Angeles after the Eaton and Palisades Fires to address post-wildfire risks such as flash floods and mudslides.
It explained that experts from the Forest Service Rocky Mountain Research Station and the University of Idaho played a central role in immediate recovery, focusing on emergency stabilisation measures.
Eric Nicita, regional coordinator for the Forest Service Burned Area Emergency Response (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 BAER Team is made up of specialists from different agencies who conduct rapid assessments after a fire.
The Forest Service stated that the group used publicly available models and tools to evaluate conditions and guide stabilisation efforts.
Mapping burn severity and risks
According to the Forest Service, the team first produced Soil Burn Severity Maps using its Soil Burn Severity Guidebook.
It said that this data was then input into watershed models to predict potential erosion and flooding risks.
The agency explained that the Water Erosion Prediction Project (WEPP) tools were also used by several bodies, including the California Geological Survey, California’s Watershed Emergency Response Team, and Los Angeles County.
The Forest Service added that California’s Department of Forestry and Fire Protection Watershed Protection Program ran erosion risk models for each burned hillside.
It continued that these outputs were used to target areas most at risk with treatments such as straw mulching or engineered drainage.
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.”
County mitigation measures
The Forest Service reported that Los Angeles County acted on research findings by clearing debris from flood-prone basins and installing barriers such as k-rail, muscle walls and sandbags.
It said these protective measures were tested during severe weather events, including heavy rain in mid-February.
Don Lindsay of the California Geological Survey said: “To my knowledge, the work the County did was effective in minimizing damages to public and private property during the February 13th rain event.”
The Forest Service indicated that these actions reduced the risk of damage from runoff and flooding during the post-fire period.
It explained that such responses can provide communities with critical time to adapt to changing conditions after wildfires.
Tools and training access
The USDA Forest Service explained that its WEPP tools are publicly available.
It added that online tutorials have been created to train agencies and communities in using these resources.
The organisation noted that the tools produce detailed analyses of soil burn severity and erosion potential.
It explained that these outputs can be used to inform mitigation plans and guide decision making in future incidents.
The Forest Service stated that broader community preparedness is strengthened by sharing these scientific resources openly.
Post-fire recovery priorities
The Forest Service explained that its research shows post-fire stabilisation is as important as fire suppression itself.
It said that preventive work such as prescribed burning and thinning forests is well established.
However, it added that the aftermath requires sustained attention to erosion, flooding and soil stability risks.
The organisation indicated that its approach aims to limit secondary damage while maintaining public safety and protecting infrastructure.
It continued that these interventions demonstrate how science-based decision making is applied beyond active firefighting.
Relevance for fire and safety professionals
This work highlights the need for emergency planning that continues beyond fire suppression.
The USDA Forest Service’s tools show how modelling can direct stabilisation measures, reduce risks, and protect infrastructure after wildfires.
Fire and safety professionals can apply similar approaches to assess hazards, prioritise interventions, and strengthen local preparedness.
The example also illustrates how interagency teams combine scientific methods and operational response in complex post-fire environments.
USDA Forest Service applies science to Los Angeles wildfires recovery: Summary
The USDA Forest Service reported that scientific teams were deployed to Los Angeles after the Eaton and Palisades Fires.
It said the teams worked on stabilisation and mitigation of post-fire hazards such as flooding and mudslides.
The agency explained that Soil Burn Severity Maps and watershed models were created.
It said erosion modelling guided treatments including mulching and drainage.
The Forest Service confirmed that WEPP tools were used by multiple agencies.
It reported that Los Angeles County cleared basins and installed barriers against flooding.
The organisation stated that these measures were effective during February rainstorms.
It explained that the WEPP tools are publicly available with online tutorials.
The agency added that post-fire interventions are as important as suppression work.
It concluded that science-led strategies aim to reduce risks and protect communities after fires.