--- title: "Wildfire Risk in Alameda County, CA 2026 | Satelife" description: "Wildfire risk is not the same everywhere in Alameda County. In the places we scored, overall wildfire risk runs from 12.0 in San Lorenzo up to 76.5 near Livermore, with a county midpoint of 36.6." image: "https://satelife.ai/images/wildfire-risk/alameda-county/generated/alameda-county-locator.webp" canonical: "https://satelife.ai/wildfire-risk/california/alameda-county/" --- [Home](/)›[Wildfire Risk](/wildfire-risk/)›[California](/wildfire-risk/california/)›Alameda County Alameda County, California # Wildfire risk in Alameda County: _where it is highest_, and why Wildfire risk is not the same everywhere in Alameda County. In the places we scored, overall wildfire risk runs from 12.0 in San Lorenzo up to 76.5 near Livermore, with a county midpoint of 36.6. [Score my Alameda County address →](#score-my-address) [How risky is this county? ↓](#risk-at-a-glance) Before 20002000s2010s2020sCommunity Alameda County — the largest fires on record, at their perimeter centres, with the county’s main communities. Select a marker for its detail. At a glance ## Half of Alameda County scores _Moderate_ or worse We scored 169 points across Alameda County on the same 0–100 scale a Satelife address report uses, and they do not land in one place. 1% of them come out Very High, while 34% are Low. Which end your own parcel sits at is not something a county map can tell you. 37% 27% 34% **Very High** 1% · 2 of 169 points **High** 37% · 63 of 169 points **Moderate** 27% · 46 of 169 points **Low** 34% · 58 of 169 points Safest end we measured 12 near San Lorenzo · Low Middle of the county 36.6 Moderate — half of Alameda County is above this Most exposed end we measured 76.5 near Livermore · Very High ### And the federal models agree it is a fire county Relatively High FEMA National Risk Index — wildfire risk rating · index score 97.7 / 100 $11.6M / yr FEMA NRI — expected annual loss from wildfire · rated Relatively High 0.97% USFS Wildfire Risk to Communities — mean annual burn probability · 90th-percentile cell 1.97% 3.17 ft USFS WRC — mean conditional flame length · 70% of the county carries burnable fuel FEMA NRI also rates Alameda County: all-hazards risk Very High · social vulnerability Relatively Low · community resilience Very High · annualised wildfire frequency 0.0058. Sources: FEMA National Risk Index 1.20.0 (Dec 2025), county record · USFS Wildfire Risk to Communities v2.0, mean of the grid cells inside the county. Both describe the county as a whole, never an address in it. What does your Alameda County address score? A county range shows the spread. Your parcel sits somewhere inside it — the report says where, and what to do about it. Free to request · PDF report with a 0–100 score, the drivers behind it, and a mitigation plan Local context ## What the data says about _Alameda County_ Looking at the four address-report tiers, High is the most common tier in the county, with 63 scored points in that band. FEMA’s National Risk Index rates Alameda County’s wildfire risk as Relatively High, and its expected annual loss from wildfire as Relatively High. A separate countywide federal model also shows meaningful exposure: mean annual burn probability is listed as 0.97%, and 70.1% of the county is in places that can burn. Fire record ## Where the fires _actually were_ Since 1984, 26,161 acres have burned within recorded perimeters in Alameda County, across 44 fire perimeters. That equals 5% of the county. The largest fire in this record is the Tesla fire (2005) at 6,440 acres. The most recent large fire is the Little fire (2026), at 1,078 acres. The Tunnel fire (1991) is notable for destruction: it is listed with 2,900 structures destroyed. ![Tunnel Fire (1991) in Alameda County, California - Northridge Earthquake, CA, January 17, 1994 -- Buildings, cars and personal property were all destroyed when the earthquake struck](/images/wildfire-risk/alameda-county/photos/fema-1707-photograph-by-fema-news-photo-taken-on-01-17-1994-.webp) **Tunnel Fire, 1991** — Alameda County. Photo: FEMA News Photo · [Public domain](https://commons.wikimedia.org/wiki/File:FEMA_-_1707_-_Photograph_by_FEMA_News_Photo_taken_on_01-17-1994_in_California.jpg) 44 mapped fire perimeters centred in the county since 1984 26,161 acres inside those perimeters since 1984 5.0% of the county's area, as a share of 2,115.5 km² Little 2026 most recent large fire on record Before 20002000s2010s2020s Fire perimeters coloured by decade. Select a perimeter for its name, year and size. Named fires on record - **Tunnel Fire**19911,623 acres2,900 structures destroyed - **Tesla Fire**20056,440 acres - **Devil Fire**20035,444 acres - **Tesla Fire**20152,990 acres - **Midway Fire**20065,540 acres in totalcrossed into the county - **Del Valle P.G.&E. Fire**19834,713 acres - **Little Fire**20261,078 acres - **Carnegie #3 Fire**19704,390 acres in totalcrossed into the county Perimeter sources: NIFC Interagency Fire Perimeter History · WFIGS Interagency Perimeters · largest on record: Tesla 2005. Perimeters are simplified for display; acreage is the figure the source records. Communities ## Where in the county you are _matters most_ Among the named communities here, higher typical wildfire risk appears in Fairview (51.1), Livermore (47.9), and Pleasanton (45.5). These are all above the county midpoint for the places scored. Lower typical wildfire risk appears in Albany (12.8), Alameda (17.3), and Oakland (18.0). Other communities fall between those ends, so local differences inside Alameda County are substantial. Fairview village 51.1 _High_ Livermore city · 86,803 people 47.9 _Moderate_ Pleasanton town · 81,777 people 45.5 _Moderate_ Fremont city · 241,110 people 35.4 _Moderate_ Castro Valley town · 61,388 people 33.9 _Moderate_ Newark town · 49,149 people 29.2 _Moderate_ San Leandro town · 88,815 people 26.8 _Moderate_ Union City town · 74,107 people 25.1 _Moderate_ Dublin town · 64,826 people 23.1 _Low_ Emeryville town · 12,086 people 22.3 _Low_ 9 more communities in Alameda County Piedmont town · 11,135 people 21.8 _Low_ Hayward city · 159,203 people 20.1 _Low_ Berkeley city · 121,363 people 18.8 _Low_ Oakland city · 433,031 people 18 _Low_ Ashland village · 21,925 people 18 _Low_ Cherryland village · 14,728 people 18 _Low_ Alameda city · 77,624 people 17.3 _Low_ San Lorenzo village · 23,452 people 14.3 _Low_ Albany town · 19,696 people 12.8 _Low_ The score is the median of the sampled points nearest that community — a community-scale indicator, not a score for any individual property in it. Population comes from the community's own record where the source carries one. Terrain & fuels ## Terrain, vegetation and _fuels_ Terrain exposure ranges from 5.0 in Newark to 65.0 near Livermore. Steeper or more complex terrain is associated with higher wildfire risk in the inland areas. Vegetation and fuels show a similar spread, from 5.0 in Newark to 80.0 near Livermore, with a midpoint of 42.3. In Alameda County, higher terrain and higher fuels often show up in the same inland locations. 40 median terrain score (max 65 near Livermore) 42.3 median vegetation & fuels score (max 80 near Livermore) ![LANDFIRE existing vegetation type map of Alameda County, California, with the county boundary outlined](/images/wildfire-risk/alameda-county/generated/alameda-county-fuels.webp) LANDFIRE existing vegetation type across Alameda County — the same fuel data that feeds the vegetation layer of a Satelife property report. Fire weather ## Fire weather across _Alameda County_ Fire weather was measured across the county, and it is comparatively tight in range: 59.9 in San Lorenzo to 67.9 in Albany, with a midpoint of 60.6. That narrow spread means fire weather is less variable place to place here than terrain, fuels, or fire history. It still contributes to wildfire risk, but it does not separate neighborhoods as strongly as some other factors in this county. 59.9 lowest fire-weather score — near San Lorenzo 67.9 highest fire-weather score — near Albany What drives it ## Which part of the risk _moves_, and which doesn't The county’s highest scored wildfire risk is near Livermore at 76.5, while the lowest is in San Lorenzo at 12.0. That gap is large enough that where a home sits inside the county matters a lot for exposure. By tier counts, Very High appears at 2 scored points, High at 63, Moderate at 46, and Low at 58. So the pattern is mixed, but weighted toward High and Low rather than concentrated in just one tier. Each bar is what one part of the score covers across Alameda County, on the same 0–100 scale. A long bar is a part of the risk that depends on where you are; a short one is the same almost everywhere. Terrain 5–65 highest near Livermore Vegetation & fuels 5–80 highest near Livermore Hazard zone 10–90 highest near Fremont Fire history 5–95 highest near Fremont Fire weather 59.9–67.9 highest near Albany Overall score 12–76.5 highest near Livermore The tick on each bar is the middle value. Tier boundaries — Moderate at 25, High at 50, Very High at 75 — are the faint lines behind them. Show every number behind these bars Layer Min Median Max Lowest place Highest place Points Terrain 5 40 65 Newark near Livermore 169 Vegetation & fuels 5 42.3 80 Newark near Livermore 169 Hazard zone 10 40 90 Newark near Fremont 169 Fire history 5 5 95 Newark Fremont 168 Fire weather 59.9 60.6 67.9 San Lorenzo Albany 169 Composite 12 36.6 76.5 San Lorenzo near Livermore 169 Independently of Satelife's layers, the USFS Wildfire Risk to Communities grid puts the county's mean annual burn probability at **0.97%** (90th percentile cell: **1.97%**), with a mean conditional flame length of **3.17 ft**. **70%** of the 21,248 grid cells inside the county carry burnable fuel at all. Source: USFS Wildfire Risk to Communities v2.0 (ImageServer, county extent). CAL FIRE has no mapped Fire Hazard Severity Zone at **5** of the 169 sampled points — the zones cover Local Responsibility Areas. At **3** of them the USFS grid above supplied the hazard reading instead; at the remaining 2 the hazard weight is renormalised away rather than scored as low. 169 sample points on a ~2.3 km grid, plus one at the centre of each community, weighted with the Satelife county profile v1 · median layer coverage 100%. Scores are 0–100 and comparable within the county, not across states. For a property ## What a county range means for _one address_ Property-by-property features were not measured in this county summary. What is available for buyers, owners, and agents is area-level wildfire risk context: local scored patterns by community and countywide burn-probability context from the federal model. That model reports mean annual burn probability at 0.97%, with a 90th-percentile cell value of 1.97%, and it shows 70.1% of the county in places that can burn. Across 169 sampled points in Alameda County, the score runs from 12 to 76.5 — two neighbouring parcels can sit in different tiers. A county number is the middle of that spread; it says nothing about which end yours is at. Find out where your Alameda County parcel sits Slope, the fuel touching the structure, the road out, the fire history within a mile — measured at your address, not averaged across the county. Free to request · PDF report with a 0–100 score, the drivers behind it, and a mitigation plan Coverage ## ZIP codes we cover in Alameda County Every one of the 65 ZIP areas that touch Alameda County — we run address-level reports in all of them. They are grouped by the median score of the points we sampled inside each, which is a neighbourhood-scale indicator and **not** a score for any property: two homes in the same ZIP routinely land in different tiers. **High** 5 ZIPs - [95377 Livermore65](/wildfire-risk/zip/95377/) - [94550 Livermore63](/wildfire-risk/zip/94550/) - [95391 Livermore62](/wildfire-risk/zip/95391/) - [94586 Pleasanton56](/wildfire-risk/zip/94586/) - [94552 Fairview52](/wildfire-risk/zip/94552/) **Moderate** 13 ZIPs - [94551 Livermore48](/wildfire-risk/zip/94551/) - [94546 Castro Valley47](/wildfire-risk/zip/94546/) - [94555 Newark45](/wildfire-risk/zip/94555/) - [94605 San Leandro44](/wildfire-risk/zip/94605/) - [94536 Fremont39](/wildfire-risk/zip/94536/) - [94539 Fremont39](/wildfire-risk/zip/94539/) - [94544 Hayward34](/wildfire-risk/zip/94544/) - [94514 Livermore32](/wildfire-risk/zip/94514/) - [94566 Pleasanton31](/wildfire-risk/zip/94566/) - [94538 Fremont31](/wildfire-risk/zip/94538/) - [94560 Newark29](/wildfire-risk/zip/94560/) - [94588 Dublin29](/wildfire-risk/zip/94588/) - [94542 Fairview29](/wildfire-risk/zip/94542/) **Low** 19 ZIPs - [94611 Piedmont25](/wildfire-risk/zip/94611/) - [94608 Emeryville24](/wildfire-risk/zip/94608/) - [94618 Piedmont22](/wildfire-risk/zip/94618/) - [94702 Berkeley22](/wildfire-risk/zip/94702/) - [94568 Dublin21](/wildfire-risk/zip/94568/) - [94619 Piedmont21](/wildfire-risk/zip/94619/) - [94541 Hayward20](/wildfire-risk/zip/94541/) - [94612 Oakland20](/wildfire-risk/zip/94612/) - [94545 San Lorenzo20](/wildfire-risk/zip/94545/) - [94704 Berkeley19](/wildfire-risk/zip/94704/) - [94706 Albany19](/wildfire-risk/zip/94706/) - [94501 Oakland18](/wildfire-risk/zip/94501/) - [94577 San Leandro18](/wildfire-risk/zip/94577/) - [94580 San Lorenzo18](/wildfire-risk/zip/94580/) - [94587 Union City18](/wildfire-risk/zip/94587/) - [94601 Alameda18](/wildfire-risk/zip/94601/) - [94602 Piedmont18](/wildfire-risk/zip/94602/) - [94607 Oakland18](/wildfire-risk/zip/94607/) - [94621 Alameda18](/wildfire-risk/zip/94621/) **No sampled point inside** 28 ZIPs [94502 Alameda](/wildfire-risk/zip/94502/) · [94505 Livermore](/wildfire-risk/zip/94505/) · [94516 Piedmont](/wildfire-risk/zip/94516/) · [94530 Albany](/wildfire-risk/zip/94530/) · [94556 Piedmont](/wildfire-risk/zip/94556/) · [94563 Berkeley](/wildfire-risk/zip/94563/) · [94578 Ashland](/wildfire-risk/zip/94578/) · [94579 San Lorenzo](/wildfire-risk/zip/94579/) · [94582 Dublin](/wildfire-risk/zip/94582/) · [94583 Dublin](/wildfire-risk/zip/94583/) · [94603 San Leandro](/wildfire-risk/zip/94603/) · [94606 Oakland](/wildfire-risk/zip/94606/) · [94609 Emeryville](/wildfire-risk/zip/94609/) · [94610 Piedmont](/wildfire-risk/zip/94610/) · [94613 Alameda](/wildfire-risk/zip/94613/) · [94703 Berkeley](/wildfire-risk/zip/94703/) · [94705 Berkeley](/wildfire-risk/zip/94705/) · [94707 Albany](/wildfire-risk/zip/94707/) · [94708 Albany](/wildfire-risk/zip/94708/) · [94709 Berkeley](/wildfire-risk/zip/94709/) · [94710 Albany](/wildfire-risk/zip/94710/) · [94720 Berkeley](/wildfire-risk/zip/94720/) · [94804 Albany](/wildfire-risk/zip/94804/) · [95002 Newark](/wildfire-risk/zip/95002/) · [95035 Fremont](/wildfire-risk/zip/95035/) · [95134 Fremont](/wildfire-risk/zip/95134/) · [95304 Livermore](/wildfire-risk/zip/95304/) · [95363](/wildfire-risk/zip/95363/) Grouped from 37 of 65 ZIP areas — the rest had no sample point fall inside them. The community shown is the nearest mapped place to the ZIP's centre. ZIP areas are Census 2020 ZIP Code Tabulation Areas intersecting the county boundary. Where to go next ## Alameda County wildfire risk _in context_ [California wildfire risk The statewide picture and every county page we publish](/wildfire-risk/california/) [Wildfire risk by state Every state and county we cover](/wildfire-risk/) [How Satelife calculates wildfire risk Data sources, layers, score composition, honest limits](/wildfire-risk/methodology/) [Create a wildfire evacuation plan Zones, egress routes, refuge areas](/wildfire-evacuation-plan/) [Run a report for a Alameda County address PDF + score + mitigation plan](/#cta) FAQ ## Frequently asked questions about _Alameda County wildfire risk_ What is the biggest fire listed for Alameda County? The largest fire in this record is Tesla (2005), at 6,440 acres. What is the most recent large fire listed? The most recent large fire is the Little fire (2026), listed at 1,078 acres. How much of Alameda County has burned since 1984? The record here shows 26,161 acres burned since 1984, which is 5% of the county. What does FEMA say about countywide wildfire risk? FEMA’s National Risk Index rates Alameda County’s wildfire risk as Relatively High and its wildfire expected annual loss rating as Relatively High. This page is generated from a Alameda County data pack assembled on 2026-08-18 (pack v1.0). Scores are sampled across the county, not measured at any individual address, and are informational decision support — not a substitute for official evacuation orders, a fire-agency hazard determination, or an insurer's underwriting judgement. Data versions: fema\_nri 1.20.0 (Dec 2025) · landfire per adapter · nifc\_history All Years View · wfigs current · wrc v2.0 (2024) · zcta Census 2020. ## What does _your parcel_ look like, layer by layer? A county range shows the spread. An address-level Satelife report shows where in that spread your property actually sits — PDF, per-layer score, and a prioritized mitigation plan. [Start with your address →](/#cta) [![PRR](/images/prr.png)](/ficha-de-website-voucher-satelife.pdf) © 2024–2026 Satelife, Lda. All rights reserved. Satelife reports are for informational purposes only and do not constitute insurance, financial, or legal advice.