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Case File · Monterey County, California
On January 16, 2025 the Vistra-operated Moss Landing Battery Energy Storage System ignited and burned for roughly two days. Roughly 1,200 people were evacuated and Highway 1 was closed. On October 28, 2025, Supervisor Glenn Church moved a BESS moratorium; the Board of Supervisors directed county staff to draft ordinance language within thirty days.
RealClear would score a new unincorporated Monterey County Li-ion BESS site 18/100 and flag the pending ordinance, the precedent incident, and NFPA 855 (2023) deflagration requirements before any interconnection deposit.
Jan 16, 2025
Fire Date
~2 days
Burn Duration
~1,200
Evacuees
Closed
Hwy 1
Oct 28, 2025
Moratorium Vote
30 days
Drafting Window
Monterey County, California
January 16, 2025
Moss Landing BESS ignites
A fire breaks out in the Vistra-operated Moss Landing BESS building, which housed tens of thousands of Li-ion cells — described by multiple outlets as the largest Li-ion BESS installation in the United States. The fire burns for approximately two days. Monterey County emergency services order the evacuation of roughly 1,200 residents in the surrounding area and shut Highway 1 in segments. California Highway Patrol and local fire agencies manage the incident perimeter while the building burns down to containment.
January–February 2025
Air and soil exposure questions surface
Post-event reporting in MIT Technology Review and Utility Dive describes particulate deposition concerns across Moss Landing, Elkhorn Slough, and adjacent farm parcels. Community testing groups and county environmental staff coordinate soil-sample programs. Local agricultural operators, schools, and Elkhorn Slough stewards begin organizing around the incident. Vistra, PG&E, and state agencies trade briefings; the incident's political footprint expands from a single facility to a county-wide siting question.
Spring–Summer 2025
Regional spillover to Orange County and Morro Bay
Orange County's Board of Supervisors enacts an emergency moratorium on approving any new BESS facility in unincorporated OC, citing health, safety, and welfare grounds (Energy-Storage.News, 2025). Morro Bay City Council unanimously adopts a two-year construction ban on battery-plant projects; the developer of an oceanfront BESS proposal withdraws the application (Daily Gazette syndication, 2025). The pattern is consistent: coastal California jurisdictions re-examine Li-ion BESS siting in the immediate wake of Moss Landing.
October 28, 2025
Supervisor Glenn Church moves a Monterey County moratorium
At the Monterey County Board of Supervisors meeting, Supervisor Glenn Church introduces a motion directing staff to draft a moratorium on new BESS facilities. The Board directs staff to return with draft ordinance language within thirty days (CTIF International Fire Services, 2025). The motion is framed around Moss Landing's air-quality and evacuation record and around the absence of a county-specific BESS siting framework. Staff begins work on the draft ordinance.
November 2025–Q1 2026
Ordinance drafting, public hearings, and NFPA 855 alignment
County staff work draws in fire marshal input, NFPA 855 (2023 edition) deflagration-venting requirements, Hazardous Materials Business Plan coordination with CAL FIRE / Monterey County Regional Fire, and stakeholder comment from energy developers and community groups. The final moratorium vote, the duration of the prohibition, and the specific exemptions for flow-battery or non-Li-ion chemistries are the key open variables as of the late 2025 posture used for this case file.
The Incident
Largest U.S. BESS Fire
Moss Landing's fire on January 16, 2025 was repeatedly characterized by Utility Dive and MIT Technology Review as the largest Li-ion BESS fire recorded in the United States. The facility contained tens of thousands of cells. The two-day burn window and ~1,200-person evacuation generated photographs and local-broadcast footage that now anchor every subsequent Monterey County BESS hearing.
The Legal Frame
Moratorium in Drafting
California Government Code authorizes counties to adopt interim urgency ordinances to address threats to public health, safety, or welfare (Cal. Gov. Code §§ 65858, 25123). Monterey County's October 28, 2025 direction invokes that framework. The operative question is whether the final ordinance is structured as an interim urgency ordinance (initial 45-day duration, extendable) or a longer-horizon regular ordinance with permanent siting standards.
The Code Frame
NFPA 855 (2023)
NFPA 855 governs stationary energy storage system installation nationally and is incorporated by reference in most California jurisdictions through the California Fire Code. Post-Moss-Landing, fire-marshal scrutiny of deflagration venting, explosion control, unit spacing (≥3 ft outdoor separation for Li-ion), and Hazardous Materials Business Plan (HMBP) filings has tightened materially. Applicants relying on pre-2023 plan sets face rework.
The Regional Signal
Coastal CA Repriced
Orange County emergency moratorium, Morro Bay's unanimous 5-0 two-year ban and the voluntary withdrawal of the Morro Bay oceanfront BESS project, and community demands at Santa Cruz County BoS (February 11, 2025) have moved coastal-California BESS siting from a permitting question into a political one. The Monterey County action is now the template other coastal counties are watching.
Key Decision Makers & Stakeholders
Supervisor Glenn Church
Monterey County Board of Supervisors
District 2
Documented Record
Moved the motion at the October 28, 2025 Board meeting directing staff to return a BESS moratorium ordinance within 30 days. Motion framed around Moss Landing's evacuation footprint, Highway 1 closure, and the absence of a county-specific BESS siting framework. The Board directed staff to proceed with drafting (CTIF International Fire Services, 2025).
Church is the political actor of record on the moratorium. Any applicant engagement with the county must map whether the moratorium passes as an interim urgency ordinance (Gov. Code § 65858) or as a regular ordinance — and whether specific chemistries (flow battery, iron-air, sodium-ion) are exempted.
Monterey County Board of Supervisors
County Governing Body
Five districts
Documented Record
Directed staff on October 28, 2025 to draft moratorium language within 30 days. Directional vote — not the final ordinance adoption. Final adoption, moratorium duration, and any chemistry-specific carve-outs remain open at the case file's posture date.
The Board's posture is the primary political variable. A five-vote majority is required to adopt an interim urgency ordinance. Applicant strategy must account for the multi-district political geography — Salinas Valley, Big Sur coast, and the Monterey Peninsula each have distinct BESS risk tolerance.
Vistra Energy / LS Power (Moss Landing operator)
Incident Site Operator
Moss Landing, CA
Documented Record
Operated the Moss Landing BESS facility that ignited on January 16, 2025. Industry trade press (Utility Dive) and MIT Technology Review covered the fire's technical causes, the cell chemistry involved, and the containment response. Vistra has been the public face of the incident across subsequent regulatory discussions.
Vistra is not the applicant for a new moratorium-era project, but its Moss Landing incident is the dominant reference in every Monterey County BESS hearing. The incident's factual record — not the operator's subsequent communications — is the load-bearing evidence for the county posture.
California Public Utilities Commission (CPUC)
State Utility Regulator
San Francisco, CA
Documented Record
CPUC administers Resource Adequacy procurement obligations for the IOUs and permits long-duration storage programs (Decision 23-04-034 on mid-term reliability). CPUC's procurement mandates require the IOUs to add storage even as local moratoria restrict siting — a direct collision surfaced by the Moss Landing fire.
The CPUC posture is structurally supportive of storage. The collision between CPUC procurement mandates and local moratoria is the state-level dynamic applicants must calibrate for. A permitted site that survives a local moratorium carries a durable Resource Adequacy revenue tail because state procurement obligations have not contracted.
CAL FIRE & Monterey County Regional Fire
Fire Authority
Monterey County operational jurisdiction
Documented Record
Managed the Moss Landing incident perimeter, coordinated evacuations with the Sheriff, and participated in post-incident briefings. Fire-marshal technical input is now central to any BESS ordinance drafting — NFPA 855 (2023) incorporation, deflagration venting, unit spacing, Hazardous Materials Business Plan clearances.
The fire authority is a procedural gatekeeper under the California Fire Code. Applicants whose plan sets rely on pre-2023 NFPA 855 assumptions face substantive rework in the post-Moss-Landing review environment.
Elkhorn Slough / Moss Landing Community
Affected Residents & Agricultural Operators
Unincorporated Monterey County
Documented Record
Community groups organized soil-sample programs, pushed the county for particulate deposition investigations, and anchored public comment at multiple 2025 Board meetings. Post-event local coverage in regional outlets amplified the evacuation experience into a siting-scale political response.
The community posture is the load-bearing political force that converted an operator incident into a county-wide moratorium. Applicant engagement without source-backed community-risk groundwork invites the same outcome replicated at the next site.
“The moratorium is the receipt. The fire was the bill.”
The Pre-Filing Research
Before a landowner option. Before an interconnection deposit. Before a plan set hits the county fire marshal.
Site Analysis
Hypothetical 200 MW / 800 MWh BESS
Unincorporated Monterey County, CA
Moratorium
Precedent Incident
Community Risk
NFPA 855 Exposure
Comparable Flag
Orange County enacted an emergency moratorium on unincorporated-area BESS in the same post-Moss-Landing window. Morro Bay City Council voted 5-0 for a two-year construction ban and the adjacent oceanfront BESS was withdrawn. Coastal California BESS siting repriced overnight.
Recommendation
DO NOT PROCEED at unincorporated Monterey County sites under Li-ion chemistry. Wait for the ordinance text and the board's final vote. Evaluate flow-battery or iron-air alternatives and reconfirm NFPA 855 deflagration venting and HMBP clearances before any engagement.
Pre-Moss-Landing (2024)
Before the January 16, 2025 incident, a Monterey County unincorporated BESS site screened in the low 60s — CPUC-supportive procurement posture, buildable rural parcels, but already some local resistance to large-scale storage in sensitive coastal and agricultural zones.
Post-October 28, 2025 (Current)
After the Board's drafting direction, a new Li-ion BESS site in unincorporated Monterey County screens materially below the Orange County and Morro Bay comparables. The pathway is blocked through the moratorium window, and the post-moratorium environment is expected to require chemistry-specific exemptions and rebuilt NFPA 855 (2023) plan sets.
The Moss Landing incident did not just cost Vistra. It repriced every unbuilt Li-ion BESS project in coastal California — measured by the cascade into Orange County, Morro Bay, Santa Cruz County, and now Monterey County. That cascade is exactly the kind of regional comparable signal RealClear's Comparable outcomes review surfaces before capital is committed.
The Decision Framework
Moss Landing rewrote the rules. Capital allocation must reflect the new rules, not the old ones.
If screening coastal California BESS
Monterey, Orange, San Luis Obispo (Morro Bay), and Santa Cruz counties are now moratorium or pre-moratorium jurisdictions. Screen for chemistry-specific carve-outs and for the ordinance type (interim urgency under Gov. Code § 65858 vs permanent). Inland counties with existing BESS siting ordinances have become relatively stronger.
If your plan set is pre-2023 NFPA 855
NFPA 855 (2023) updated deflagration venting and explosion-control requirements after the UL 9540A large-scale fire test framework matured. Post-Moss-Landing fire-marshal scrutiny materially raises the chance of a plan-set re-submittal. Budget for a full NFPA 855 (2023) refresh and UL 9540A test documentation before any California BESS submittal.
If your community outreach started post-filing
The Moss Landing pattern confirms that post-filing outreach is structurally late. Community risk review coverage — Elkhorn Slough stewardship groups, school districts, agricultural operators, evacuation-zone residents — must be completed pre-option. Concessions after a moratorium motion have not reversed the political trajectory in any coastal California comparable.
The lesson from Moss Landing:
A single high-profile incident converts BESS from a permitting workflow into a political workflow across an entire region. The ordinances that follow persist even after operational conditions change. Screening must price the political tail, not just the technical one.
Know the fire-event tail before you pay the interconnection deposit.
Know the moratorium before you lease
RealClear runs a full entitlement risk analysis for new BESS sites — jurisdictional moratorium status, NFPA 855 exposure, fire-event comparables, CPUC Resource Adequacy tail, and community opposition posture — before a site-control check is cut.
Cited research summary · Not legal advice · Verify independently before making investment decisions
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