Dome Fire Reaches 6,632 Acres in Yosemite, 40% Contained as of Oct. 3
The Dome Fire has burned 6,632 acres in Yosemite National Park and is 40% contained as of Oct. 3, with 765 personnel assigned; Glacier Point Road stays closed.
CA
In 2025, fire departments serving Walnut responded to 29 fire and hazmat incidents — from cooking fires to gas leaks to a single $700K building blaze. Here's the full picture.
Gas leak (natural gas or LPG) lead by count. Building fires lead by dollars. Together the top five categories make up about 52% of all calls.
May peaks. Oct dips. Watch for the typical fall climb starting in October.
136 incidents 2021–2025. Peak year was 2023. $3.0M cumulative property loss.
| Year | Incidents | YoY | |
|---|---|---|---|
| 2021 | 26 | — | |
| 2022 | 20 | -23.1% | |
| 2023 | 32 | +60.0% | |
| 2024 | 29 | -9.4% | |
| 2025 | 29 | +0.0% |
For the 1 building fires Walnut departments responded to in 2025, here's how they were classified once investigators were finished.
NFIRS Area of Origin (AREA_ORIG) for the 33 building fires investigators classified across 2021–2025. The room or location where ignition occurred — kitchens, bedrooms, exterior, vehicle areas — tells you where to focus prevention.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Vehicle storage area; garage, carport | 6 | 18.2% | |
| 2 | Engine area, running gear, wheel area | 6 | 18.2% | |
| 3 | Vehicle area, other | 4 | 12.1% | |
| 4 | Undetermined | 4 | 12.1% | |
| 5 | Other | 3 | 9.1% | |
| 6 | Outside area, other | 2 | 6.1% | |
| 7 | Courtyard, patio, porch, terrace | 2 | 6.1% | |
| 8 | Dining room, cafeteria bar area, beverage service | 1 | 3.0% | |
| 9 | Maintenance shop or area, paint shop or area | 1 | 3.0% | |
| 10 | Substructure area or space, crawl space | 1 | 3.0% | |
| 11 | All other areas | 3 | 9.1% |
NFIRS Heat Source (HEAT_SOURC) — the physical thing that started it. Spark or ember from operating equipment, an open flame, smoking materials, or hot embers from a fireplace are the leading culprits nationwide. Here's the Walnut mix.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 10 | 30.3% | |
| 2 | Heat from powered equipment, other | 6 | 18.2% | |
| 3 | Arcing | 5 | 15.2% | |
| 4 | Heat source: other | 4 | 12.1% | |
| 5 | Spark, ember or flame from operating equipment | 1 | 3.0% | |
| 6 | Radiated, conducted heat from operating equipment | 1 | 3.0% | |
| 7 | Hot or smoldering object, other | 1 | 3.0% | |
| 8 | Explosive, fireworks, other | 1 | 3.0% | |
| 9 | Heat from other open flame or smoking materials | 1 | 3.0% | |
| 10 | Cigarette | 1 | 3.0% | |
| 11 | All other sources | 2 | 6.1% |
Largest single-incident property losses reported by Walnut departments in 2025. These 4 fires alone account for 100% of the city's annual total.
| # | Property loss | Type | Severity | Status |
|---|---|---|---|---|
| 1 | $700,000 | Building fires | Major | Investigated |
| 2 | $25,000 | Mobile property (vehicle) fire, other | Significant | Investigated |
| 3 | $1,500 | Cooking fire, confined to container | Significant | Investigated |
| 4 | $500 | Dumpster or other outside trash receptacle fire | Significant | Investigated |
Per-capita rates let us compare apples to apples. Walnut sits below the national average for incidents per resident.
Top 25 wildfires (1992+) in the FPA-FOD ignitions database, scaled by acres. 969,056 acres burned in this 50-mile radius. Each dot is a fire — bigger dots burned more land.
| Year | Cause | Acres | Distance | |
|---|---|---|---|---|
| 2009 | Arson/incendiarism | 160,371 | 23.7 mi | |
| 2020 | Missing data/not specified/undetermined | 115,997 | 15.9 mi | |
| 2003 | Arson/incendiarism | 91,281 | 35.2 mi | |
| 1999 | Missing data/not specified/undetermined | 65,000 | 44.5 mi | |
| 2003 | Arson/incendiarism | 59,788 | 23.5 mi | |
| 2016 | Missing data/not specified/undetermined | 41,432 | 41.5 mi | |
| 2007 | Misuse of fire by a minor | 38,356 | 43.4 mi | |
| 2002 | Arson/incendiarism | 37,240 | 14.2 mi | |
| 2016 | Missing data/not specified/undetermined | 36,274 | 27.7 mi | |
| 2008 | Missing data/not specified/undetermined | 30,305 | 13.1 mi | |
| 2007 | Missing data/not specified/undetermined | 28,476 | 22.7 mi | |
| 2005 | Missing data/not specified/undetermined | 24,970 | 46.3 mi |
Top 4 ZIP codes by NFIRS incident count across 2021–2025. Each ZIP has its own fire profile — dive in for neighborhood-level context.
Six California cities with population within ±25% of Walnut. Useful comparison targets — same state, similar size, different fire profile.
A 30-minute weekend can cut your home's exposure substantially. These four checklists are a good starting point.
Numbers reflect incidents reported by participating fire departments to the National Fire Incident Reporting System (NFIRS) Public Data Release for calendar year 2025. NFIRS is voluntary — about 23,000 of roughly 30,000 US fire departments report — so totals are a strong indicator, not a complete census. Per-capita comparisons use 2023 ACS population estimates. Wildland fire data complements NFIRS with NIFC and USFS perimeters. Active-fire counts come from a dated NIFC snapshot, not a live feed.