--- title: "Wildfire Risk in Glenn County, CA 2026 | Satelife" description: "Wildfire risk in Glenn County spans a wide range across the places we scored. Scores run from 18.5 in Willows to 78.6 near Willows, with a county midpoint of 47.4." image: "https://satelife.ai/images/wildfire-risk/glenn-county/generated/glenn-county-locator.webp" canonical: "https://satelife.ai/wildfire-risk/california/glenn-county/" --- [Home](/)›[Wildfire Risk](/wildfire-risk/)›[California](/wildfire-risk/california/)›Glenn County Glenn County, California # Wildfire risk in Glenn County: _where it is highest_, and why Wildfire risk in Glenn County spans a wide range across the places we scored. Scores run from 18.5 in Willows to 78.6 near Willows, with a county midpoint of 47.4. [Score my Glenn County address →](#score-my-address) [How risky is this county? ↓](#risk-at-a-glance) Before 20002000s2010s2020sCommunity Glenn 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 Glenn County scores _Moderate_ or worse We scored 153 points across Glenn 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 22% are Low. Which end your own parcel sits at is not something a county map can tell you. 45% 31% 22% **Very High** 1% · 2 of 153 points **High** 45% · 69 of 153 points **Moderate** 31% · 48 of 153 points **Low** 22% · 34 of 153 points Safest end we measured 18.5 near Willows · Low Middle of the county 47.4 Moderate — half of Glenn County is above this Most exposed end we measured 78.6 near Willows · Very High ### And the federal models agree it is a fire county Relatively Moderate FEMA National Risk Index — wildfire risk rating · index score 91.8 / 100 $2.2M / yr FEMA NRI — expected annual loss from wildfire · rated Relatively Moderate 1.43% USFS Wildfire Risk to Communities — mean annual burn probability · 90th-percentile cell 3.65% 4.19 ft USFS WRC — mean conditional flame length · 91% of the county carries burnable fuel FEMA NRI also rates Glenn County: all-hazards risk Relatively Low · social vulnerability Very Low · community resilience Very Low · annualised wildfire frequency 0.0042. 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 Glenn 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 _Glenn County_ Looking at the four risk tiers used in address reports, the largest count of scored points is in the High tier (69 points). The rest are spread across Moderate (48), Low (34), and a small number in Very High (2). Fire record ## Where the fires _actually were_ Since 1984, 54,775 acres have burned in Glenn County, and 6.5% of the county has burned in that period. The county record here includes 51 fire perimeters since 1984. The largest fire named for Glenn County in this summary is Trough (2001), at 24,927 acres. The most recent large fire is Corbin (2020), at 6,061 acres. Two very large fires also affected the county in part: Doe (2020) at 589,835 acres and Ranch (2018) at 410,202 acres. ![Ranch Fire (2018) in Glenn County, California - In a year of record-breaking fires, California scored another record on August 7, 2018, when the Mendocino Complex burst into the ](/images/wildfire-risk/glenn-county/photos/california-wildfires-modis-2018-08-08.webp) **Ranch Fire, 2018** — Glenn County. Photo: MODIS Land Rapid Response Team, NASA GSFC · [Public domain](https://commons.wikimedia.org/wiki/File:California_Wildfires_\(MODIS_2018-08-08\).jpg) ![Trough Fire (2001) in Glenn County, California - After undocking with Space Station Alpha, on August 20, 2001, astronauts on the Space Shuttle photographed wildfires burning in th](/images/wildfire-risk/glenn-county/photos/california-wildfires-as-seen-from-the-space-shuttle-1727-16.webp) **Trough Fire, 2001** — Glenn County. Photo: Astronaut photographs STS105-E-5421, STS105-E-5416, and STS105-E-5417 were taken from the Space Shuttle on August 20, 2001, and were provided by the Earth Scien · [Public domain](https://commons.wikimedia.org/wiki/File:California_Wildfires_as_Seen_From_the_Space_Shuttle_\(1727_-_16\).jpg) 51 mapped fire perimeters centred in the county since 1984 54,775 acres inside those perimeters since 1984 6.5% of the county's area, as a share of 3,416.5 km² Corbin 2020 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 - **Doe Fire**2020589,835 acres in totalcrossed into the county - **Ranch Fire**2018410,202 acres in totalcrossed into the county - **Grindstone Fire**192239,806 acres - **Trough Fire**200124,927 acres - **Corbin Fire**20206,061 acres - **Spanish Fire**20036,050 acres - **Squaw Ridge Fire**19796,861 acres - **Logan Fire**19616,707 acres Perimeter sources: NIFC Interagency Fire Perimeter History · WFIGS Interagency Perimeters · largest on record: Trough 2001. 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, Willows (23.6) and Orland (23.5) are very similar on their typical score, while Hamilton City is higher at 29.0. All three community medians are below the county midpoint score of 47.4, which shows that higher-risk locations in Glenn County are concentrated outside these town and village centers in the places scored. Hamilton City village 29 _Moderate_ Willows town · 6,072 people 23.6 _Low_ Orland town 23.5 _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-related risk ranges from 20.0 near Willows to 65.0 in unincorporated Glenn County, with a midpoint of 40.0. That spread shows meaningful topographic differences across the county. Vegetation and fuels show an even wider spread, from 5.0 near Orland to 80.0 near Willows, with a midpoint of 55.0. In practical terms, fuel conditions contribute very differently depending on where you are. 40 median terrain score (max 65 near unincorporated Glenn County) 55 median vegetation & fuels score (max 80 near Willows) Fire weather ## Fire weather across _Glenn County_ Fire-weather scores are elevated across the county, ranging from 55.3 in unincorporated Glenn County to 73.5 near Willows. The midpoint is 64.5, so weather-related exposure is a major part of the county’s wildfire risk profile. A separate countywide burn-probability model reports a mean annual burn probability of 1.43% and a 90th-percentile cell value of 3.65%. That model is not a fire-weather measure; it is a modeled burn-probability product. 55.3 lowest fire-weather score — near unincorporated Glenn County 73.5 highest fire-weather score — near Willows What drives it ## Which part of the risk _moves_, and which doesn't Risk is not uniform from one part of the county to another. The lowest and highest overall scores are both tied to the Willows area, from 18.5 in Willows up to 78.6 near Willows. Past-fire and mapped-hazard patterns also vary sharply by location. Fire history scores run from 5.0 to 95.0 (both near Willows), while hazard-zone scores run from 10.0 near Willows up to 97.4 near Orland. Each bar is what one part of the score covers across Glenn 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 20–65 highest near unincorporated Glenn County Vegetation & fuels 5–80 highest near Willows Hazard zone 10–97.4 highest near Orland Fire history 5–95 highest near Willows Fire weather 55.3–73.5 highest near Willows Overall score 18.5–78.6 highest near Willows 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 20 40 65 near Willows unincorporated Glenn County 153 Vegetation & fuels 5 55 80 near Orland near Willows 153 Hazard zone 10 63.6 97.4 near Willows near Orland 153 Fire history 5 20 95 near Willows near Willows 153 Fire weather 55.3 64.5 73.5 unincorporated Glenn County near Willows 153 Composite 18.5 47.4 78.6 Willows near Willows 153 Independently of Satelife's layers, the USFS Wildfire Risk to Communities grid puts the county's mean annual burn probability at **1.43%** (90th percentile cell: **3.65%**), with a mean conditional flame length of **4.19 ft**. **91%** of the 31,938 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 **40** of the 153 sampled points — the zones cover Local Responsibility Areas. At **40** of them the USFS grid above supplied the hazard reading instead. 153 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_ FEMA’s National Risk Index rates Glenn County’s wildfire risk as Relatively Moderate, and its expected annual loss from wildfire as Relatively Moderate. FEMA rates the county’s all-hazards risk as Relatively Low. This county summary does not measure parcel-by-parcel building features, so property-specific construction and defensible-space conditions were not measured here. What is included is county-scale wildfire context, including that 90.8% of the county is in areas that can burn in the modeled burn-probability product. Across 153 sampled points in Glenn County, the score runs from 18.5 to 78.6 — 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 Glenn 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 Glenn County Every one of the 18 ZIP areas that touch Glenn 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** 1 ZIP - [95939 Willows59](/wildfire-risk/zip/95939/) **Moderate** 6 ZIPs - [95988 Willows41](/wildfire-risk/zip/95988/) - [95963 Orland37](/wildfire-risk/zip/95963/) - [95970 Willows32](/wildfire-risk/zip/95970/) - [95951 Hamilton City29](/wildfire-risk/zip/95951/) - [95920 Willows28](/wildfire-risk/zip/95920/) - [95943 Willows28](/wildfire-risk/zip/95943/) **Low** 1 ZIP - [95913 Willows24](/wildfire-risk/zip/95913/) **No sampled point inside** 10 ZIPs [95917 Willows](/wildfire-risk/zip/95917/) · [95928 Hamilton City](/wildfire-risk/zip/95928/) · [95932 Willows](/wildfire-risk/zip/95932/) · [95938 Hamilton City](/wildfire-risk/zip/95938/) · [95955 Willows](/wildfire-risk/zip/95955/) · [95965 Hamilton City](/wildfire-risk/zip/95965/) · [95973 Hamilton City](/wildfire-risk/zip/95973/) · [95979 Willows](/wildfire-risk/zip/95979/) · [96021 Orland](/wildfire-risk/zip/96021/) · [96074 Orland](/wildfire-risk/zip/96074/) Grouped from 8 of 18 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 ## Glenn 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 Glenn County address PDF + score + mitigation plan](/#cta) FAQ ## Frequently asked questions about _Glenn County wildfire risk_ What is the biggest fire listed for Glenn County? In this summary, the largest named fire for Glenn County is Trough (2001), which burned 24,927 acres. What is the most recent large fire in this county summary? The most recent large fire is Corbin (2020), at 6,061 acres. How much of Glenn County has burned since 1984? 54,775 acres have burned since 1984, which equals 6.5% of the county. Are wildfire scores the same in Willows, Orland, and Hamilton City? No. Willows and Orland are close (23.6 and 23.5), while Hamilton City is higher at 29.0. Is FEMA’s rating a town-by-town score? No. FEMA’s National Risk Index ratings here apply to Glenn County as a whole, not to individual places inside the county. This page is generated from a Glenn County data pack assembled on 2026-08-19 (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.