California's 2025 fire season destroyed more than 18,000 structures in the Palisades and Eaton fires alone. This page explains how wildfire risk is calculated across the state, which counties carry the highest exposure, and what every property owner should check before insurance renewal.
Every California county has a published, data-backed page built on real Satelife samples inside it. Select a county on the map to open it — or type where you live into the box below. Satelife runs address-level reports statewide; the map marks where we have published the research, not the limit of what we can score.
Select a highlighted county to open its report page.
All 58 California counties are searchable, by ZIP code, county name or town. Not sure of the county? Type the ZIP.
Every one of California's 58 counties has a page — fifteen at a time below, alphabetical. Know where you live already? Search by ZIP, county or town instead.
Largest on record: Tesla 2005 · sampled composite 12–76.5
Largest on record: Tamarack 2021 · sampled composite 41.8–79.4
Largest on record: Power 2004 · sampled composite 24.3–79.5
Camp Fire legacy, the Ridge geography, Paradise case study
Largest on record: Butte 2015 · sampled composite 37.3–81.1
Largest on record: Fork 1996 · sampled composite 18.6–83.5
Largest on record: Morgan 2013 · sampled composite 12.7–77.4
Largest on record: Oak 2017 · sampled composite 15.7–80.9
Caldor Fire legacy, ridge-canyon WUI, Grizzly Flats case study
Largest on record: Creek 2020 · sampled composite 17.6–81.3
Largest on record: Trough 2001 · sampled composite 18.5–78.6
Largest on record: Megram 1999 · sampled composite 12.7–78.9
Largest on record: Island Lake 2013 · sampled composite 11.7–77.8
Largest on record: Oak 2007 · sampled composite 36.1–75.6
Largest on record: Borel 2024 · sampled composite 17.7–82.2
Largest on record: Skyline 1996 · sampled composite 17.7–79.8
Largest on record: Ranch 2018 · sampled composite 17.6–84.1
Largest on record: Rush 2012 · sampled composite 33.1–81.1
Woolsey & Palisades Fire legacy, Santa Monica Mountains, Malibu case study
Largest on record: Ferguson 2018 · sampled composite 17.6–80.4
Largest on record: Vision 1995 · sampled composite 12.7–73.2
Largest on record: Ferguson 2018 · sampled composite 41.4–82.2
Largest on record: Mendenhall 1987 · sampled composite 14.8–80.5
Largest on record: Mercy 1996 · sampled composite 17.5–71.9
Largest on record: Steele 2017 · sampled composite 21.3–76.7
Largest on record: Cannon 2002 · sampled composite 28–76.9
Largest on record: Basin Complex 2008 · sampled composite 16–77.2
Glass Fire legacy, wine-country WUI, Calistoga case study
Quiet fire record, full standing fuel load, Alta Sierra case study
Largest on record: Freeway_Complex 2008 · sampled composite 16.1–84.1
Mosquito Fire legacy, Foresthill Divide geography, Foresthill case study
Largest on record: Dixie 2021 · sampled composite 34.5–82
Largest on record: Esperanza 2006 · sampled composite 15.5–84.7
Largest on record: Latrobe 2017 · sampled composite 13.4–65.6
Largest on record: Rock Springs VMP 2019 · sampled composite 21.1–83.8
Largest on record: York 2023 · sampled composite 16.7–85.8
Cedar & Witch Fire legacy, Santa Ana exposure, Ramona case study
Largest on record: Elcamino 1988 · sampled composite 5–60.4
Largest on record: Corral 2009 · sampled composite 10.8–70.9
Largest on record: Gifford 2025 · sampled composite 8.8–85.1
Largest on record: Cloverdale Vmp 2010 · sampled composite 5–70
Thomas Fire & Montecito debris-flow legacy, sundowner winds, Montecito case study
Largest on record: Lick 2007 · sampled composite 13.4–82.5
Largest on record: Lockheed 2009 · sampled composite 8.7–78.4
Largest on record: Carr 2018 · sampled composite 20–82.5
Largest on record: Cottonwood 1994 · sampled composite 26.4–82.7
Largest on record: Haypress (River Complex) 2021 · sampled composite 23.9–85.3
Largest on record: Miller 1988 · sampled composite 6.7–82.6
Tubbs Fire legacy, wind-driven suburban WUI, Coffey Park case study
Largest on record: Canyon 2006 · sampled composite 13.4–77.9
Largest on record: Butte 2018 · sampled composite 13.4–75.9
Largest on record: Doe 2020 · sampled composite 18.4–85.4
Largest on record: Hopkins 2020 · sampled composite 46.1–85.2
Largest on record: Castle 2020 · sampled composite 15.6–80.9
Largest on record: Rim 2013 · sampled composite 37.1–83.6
Thomas Fire ignition, Ojai Valley geography, Ojai case study
Largest on record: County 2018 · sampled composite 13.4–83.2
Largest on record: Cascade 2017 · sampled composite 18.9–82.5
The Palisades and Eaton fires (January 2025) destroyed more than 18,000 structures across Los Angeles County — the most destructive January fires in California history. They follow the 2018 Camp Fire (153,336 acres, Butte County, 85 fatalities) and the 2017 Tubbs Fire (Sonoma County, 5,636 structures).
Statewide, acreage burned and structures lost trended sharply upward between 2017 and 2025, driven by drought cycles and Wildland-Urban Interface expansion. The peak risk window runs late May through November, with the most destructive events typically falling between August and October.
The CAL FIRE Fire Hazard Severity Zone (FHSZ) framework classifies land as Moderate, High, or Very High — and is the basis for both building-code requirements and insurer underwriting decisions.
Sources: CAL FIRE Incident Archive · USGS · NIFC annual reports.
Three vegetation types dominate California fire risk: chaparral (Southern California foothills), oak woodland (Central Coast and Sierra foothills), and mixed conifer (Sierra Nevada and Klamath ranges). Each has a different fuel-moisture cycle and flame length under fire weather.
Terrain drives ignition probability and spread rate. South-facing slopes dry out faster, steep slopes accelerate fire run, and Wildland-Urban Interface boundaries — where structures meet wildland fuels — are where most structure loss happens. Add Santa Ana winds (Southern California) or Diablo winds (Bay Area), and the same terrain becomes a different risk profile within hours.
California FAIR Plan policies surpassed 400,000 in 2024 — roughly 100% increase versus 2020, and approximately 20× the population the plan was designed for. State Farm non-renewed about 72,000 California policies in 2023; Allstate, Farmers, and AIG imposed similar restrictions.
SB 1060 (in force 2025) requires carriers to offer premium discounts for verified mitigation, turning a property-level wildfire report from a discretionary purchase into documentation with direct financial consequences. For carrier-by-carrier rules, FAIR Plan coverage details, and the SB 1060 discount path, see California wildfire insurance.
See also: California wildfire insurance.
Sources: California Department of Insurance (CDI) Annual Reports · SB 1060 text.
California Civil Code §1103 already requires sellers to disclose Natural Hazard zones at the point of sale. As insurance availability tightens, fire-zone status increasingly becomes a closing-risk variable rather than a paperwork item — buyers who cannot bind insurance cannot close.
Investors evaluating California fire-zone properties face three real options: walk away, negotiate price for the insurance gap and mitigation cost, or buy and mitigate to qualify for the SB 1060 rebate path. The third path — when documented through a Satelife report — converts mitigation cost into a measurable insurance benefit.
See also: California real estate wildfire risk.
The same composite score (0–100) and eight-layer breakdown — hazard zone, AI vision read of the parcel, terrain, fire weather, vegetation/fuel, road access, fire history, and fire-spread simulation — becomes the page a listing agent attaches to a disclosure packet, or a buyer hands their insurance broker before writing an offer contingent on coverage.
CAL FIRE's defensible-space framework defines three zones: Zone 0 (0–5 ft, ember-resistant zone, no combustibles), Zone 1 (5–30 ft, lean-clean-green), and Zone 2 (30–100 ft, reduced fuel zone). Each zone has specific maintenance requirements; documented compliance is what underwriters and the SB 1060 mitigation discount process accept as evidence.
Annual review is the rule, not the exception. Vegetation grows back, weather changes, and home-hardening choices (vents, eaves, roofing) interact with the surrounding fuel bed. A property that passed defensible-space inspection in 2024 is not necessarily compliant in 2026.
Start with the CAL FIRE Fire Hazard Severity Zone (FHSZ) viewer using your address. The viewer returns Moderate, High, or Very High classifications. For a property-level risk score that incorporates terrain, vegetation, fire history, and home-hardening signals — not just the FHSZ band — run a Satelife address-level report.
Satelife combines CAL FIRE FHSZ designations, USGS terrain and vegetation layers, NOAA fire-weather data, and First Street exposure modeling into a single property-level risk score. The full data-source list and weighting logic are documented on the methodology page.
Los Angeles, San Diego, Sonoma, Napa, El Dorado, and Placer carry the largest combination of high-VHFHSZ acreage, structure density at the WUI, and post-2017 loss totals.
California FAIR Plan is the insurer of last resort and is available statewide. It covers basic fire perils with specific policy limits and surcharges, and is generally more expensive than admitted-market coverage.
Yes — under SB 1060, in force since 2025, California carriers must offer premium discounts for verified wildfire mitigation. A Satelife mitigation report documents which actions you completed and is structured to be accepted in the carrier discount workflow.
PDF + property-level risk score + mitigation action plan you can hand to your insurance broker. Address-level, not ZIP-level.
Start with your address →