SB 1121 directs the California Office of Emergency Services (OES) to produce and publish a statewide action plan for responding to battery fires in commercial electric vehicles. The statute instructs OES to assemble guidance that helps manage the unique hazards of high‑voltage battery incidents and the secondary risks those incidents pose to people, property, and critical infrastructure.
This matters because electric commercial vehicles are becoming more common and their lithium‑ion battery failures behave differently than conventional vehicle fires: they can reignite, emit toxic plumes, threaten nearby wildlands, and create structural concerns for bridges and overpasses. A single statewide action plan aims to give first responders, transportation agencies, and fleet operators a common playbook to reduce risks and limit disruptive road closures, but it does not come with an appropriation in the bill text.
At a Glance
What It Does
Requires the Office of Emergency Services to create and publish an action plan addressing response to battery fires in commercial electric vehicles and related safety concerns. The statute sets a deadline for completion and directs OES to work with relevant partners while developing the plan.
Who It Affects
Directly relevant to first‑response agencies (fire departments and hazardous‑materials teams), the California Highway Patrol, Caltrans, commercial fleet operators and electric truck manufacturers, and labor organizations representing drivers. Local emergency managers and mutual‑aid coordinators will also use the guidance operationally.
Why It Matters
Establishes a statewide baseline where none currently exists, shaping training, incident command practices, interagency coordination, and resource allocation. The plan could shorten road closures, reduce wildfire ignition risk, and inform infrastructure inspections after EV battery incidents.
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What This Bill Actually Does
The bill charges OES with producing an operational document that emergency managers and responders can use in the field. In practice, that means OES will need to convene technical experts and practitioners, translate manufacturer technical data into responder checklists, and coordinate across agencies so incident response is consistent statewide.
The plan is intended to be practical — checklists, safety‑zone guidance, decision points for when to call bridge or environmental engineers, and suggested communications protocols for public safety and traffic management.
OES will have to reconcile varied capacities across urban and rural jurisdictions. The output therefore should include tiered recommendations — for example, minimum actions every first responder can take, plus protocols for when specialized teams or mutual‑aid resources must be summoned.
Because battery incidents can produce persistent hazards (thermal runaway and possible reignition), the plan will likely recommend monitoring and long‑duration solutions rather than single, short suppression actions.The statute frames the product as guidance rather than a new regulatory regime: it directs development and publication but does not prescribe enforcement mechanisms or fund implementation. That design means adoption and impact will depend on whether state and local agencies adopt the plan into training, mutual‑aid compacts, and procurement decisions, and whether fleets and manufacturers cooperate in supplying incident‑specific technical information.Finally, producing usable guidance will require OES to build links with vehicle manufacturers and labor representatives so responders get timely, accurate information at an incident.
The plan can also provide a pathway for integrating battery‑fire response into existing incident command systems and regional emergency plans, but it will need to be written with an eye toward variability in local resources and the realities of prolonged, resource‑intensive firefighting operations.
The Five Things You Need to Know
The bill adds Section 34521 to the California Vehicle Code, creating a statutory duty for OES related to commercial EV battery fires.
OES must develop and post the action plan on its internet website on or before January 1, 2028.
The statute requires the action plan to include, at minimum, best practices addressing: assessing high‑voltage hazards and fire risk after a collision; ensuring public and responder safety; evaluating toxic emissions and establishing a safety buffer; reducing wildfire risk; preventing structural damage to bridges and overpasses; conserving resources (including water and air support); minimizing roadway closure duration; and mitigating battery reignition.
OES must consult with specified stakeholders while developing the plan, including the Office of the State Fire Marshal, the California Highway Patrol, and the Department of Transportation, as well as electric truck manufacturers and labor organizations.
The statute expressly permits OES to consult with any other relevant state or federal agency during plan development, giving the office latitude to incorporate federal guidance or technical expertise.
Section-by-Section Breakdown
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OES duty and public posting
This subsection creates the core obligation: OES must develop an action plan and make it publicly available. Practically, the posting requirement forces the plan to be accessible to a wide audience (responders, fleets, manufacturers, local planners) and signals that OES is the central clearinghouse for statewide best practices. The public‑posting element also makes the document available for adoption into local plans, training curricula, and mutual‑aid protocols.
Minimum content — operational priorities
This paragraph lists minimum topics the plan must cover, ranging from immediate electrical‑hazard assessment to long‑term reignition mitigation and infrastructure protection. For implementers, those headings imply specific deliverables: hazard assessment protocols, sample safety‑zone distances, toxic‑plume evaluation methods, bridge inspection triggers, and criteria for when to release a roadway back to normal use. Including resource‑efficiency as a discrete item pushes OES to offer guidance calibrated to constrained water supplies and limited aerial assets.
Required stakeholder consultation
OES must consult named state agencies and industry and labor stakeholders during plan development. That consultation requirement creates a formal role for technical and operational partners: State Fire Marshal for fire science and hazardous materials, CHP for highway incident management, DOT/Caltrans for infrastructure considerations, manufacturers for battery‑specific technical data, and labor organizations for worker safety and operational realities. Those consultations will shape the plan’s technical fidelity and its practicality in the field.
Optional consultation with other state or federal agencies
This clause permits OES to seek input from additional state and federal entities, which opens the door to coordination with federal agencies such as FEMA, NHTSA, EPA, and the U.S. DOT, or with subject‑matter bodies like NFPA. That flexibility allows OES to align the plan with broader federal guidance and tap specialized technical resources, but it also means the plan’s content could vary depending on who participates in the development process.
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Who Benefits
- Local and state fire departments — receive a common, statewide playbook that can shorten on‑scene decision times, improve responder safety, and reduce variability in response across jurisdictions.
- Commercial fleet operators and drivers — gain clearer incident protocols that can reduce downtime and liability exposure by standardizing post‑collision actions and communication with responders.
- Caltrans and other infrastructure agencies — get criteria and triggers for structural assessment after battery‑related incidents, which helps prioritize inspections and protect bridges and overpasses from undetected damage.
- Communities in high‑fire‑risk areas — benefit from guidance focused on reducing wildfire ignitions and on establishing safety buffers around incidents, which can lower community exposure to fires and toxic plumes.
- Labor organizations representing drivers and responders — obtain a formal channel to influence safety guidance, including rules on evacuation, exposure limits, and work‑rest requirements in prolonged incidents.
Who Bears the Cost
- Office of Emergency Services — must dedicate staff time and technical resources to convene stakeholders, analyze technical data, and produce a usable plan without an appropriation in the text.
- Local fire departments and first responders — may bear training, equipment, and operational costs to implement recommended procedures, especially if the plan suggests new monitoring equipment or longer incident durations.
- Commercial fleets and manufacturers — could face costs to produce and share technical battery information, update onboard systems or emergency data plates, and change operating procedures to align with recommended practices.
- Caltrans and transportation agencies — may incur inspection and potential repair costs if the guidance increases assessments of bridge or overpass integrity after incidents.
- Smaller jurisdictions and rural mutual‑aid partners — may face the heaviest burden in implementing recommendations due to limited budgets and fewer specialized teams.
Key Issues
The Core Tension
The central dilemma is between producing prescriptive, technically specific guidance that maximizes safety and infrastructure protection and preserving flexibility (and respecting resource limits and proprietary data) so agencies can actually implement recommendations; concrete standards protect lives but without funding, data sharing requirements, or enforcement they risk producing a well‑intentioned document with uneven adoption.
The bill creates a statewide expectation but does not fund implementation. That mismatch raises a common practical question: will OES produce a definitive, resource‑intensive plan that local agencies cannot afford to implement, or will it limit itself to minimal, low‑cost recommendations?
The lack of appropriation also means disparities between well‑resourced urban departments and underfunded rural departments could widen if the plan does not tier recommendations to local capacity.
Another implementation tension concerns proprietary technical information. Effective battery‑fire guidance often depends on cell chemistry, pack architecture, and manufacturer‑specific suppression recommendations.
The statute requires consultation with manufacturers but does not resolve whether manufacturers must disclose detailed technical data, or how to protect proprietary information while giving responders what they need. Finally, the plan must balance competing operational priorities — minimizing roadway closures, conserving scarce water and aerial assets, protecting infrastructure, and reducing community exposure to toxic emissions — and the bill provides no mechanism for resolving tradeoffs when recommendations pull in different directions.
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