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 Thornton responded to 43 fire and hazmat incidents — from cooking fires to gas leaks to a single $80K building blaze. Here's the full picture.
Grass fire lead by count. Building fires lead by dollars. Together the top five categories make up about 49% of all calls.
Oct peaks. Feb dips. Watch for the typical fall climb starting in October.
163 incidents 2021–2025. Peak year was 2025. $1.1M cumulative property loss. 3 civilian deaths.
| Year | Incidents | YoY | |
|---|---|---|---|
| 2021 | 39 | — | |
| 2022* | 14 | — | |
| 2023 | 36 | — | |
| 2024 | 31 | -13.9% | |
| 2025 | 43 | +38.7% |
* Well below Thornton's usual volume. That almost always means one or more departments didn't submit a full year to NFIRS, not that fires dropped, so no year-over-year change is shown for it.
For the 4 building fires Thornton departments responded to in 2025, here's how they were classified once investigators were finished.
NFIRS Area of Origin (AREA_ORIG) for the 48 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 | Undetermined | 16 | 33.3% | |
| 2 | Other | 6 | 12.5% | |
| 3 | Vehicle area, other | 5 | 10.4% | |
| 4 | Engine area, running gear, wheel area | 5 | 10.4% | |
| 5 | Cooking area, kitchen | 4 | 8.3% | |
| 6 | Outside area, other | 2 | 4.2% | |
| 7 | Open area - outside; included are farmland, field | 2 | 4.2% | |
| 8 | Common room, den, family room, living room, lounge | 1 | 2.1% | |
| 9 | Laundry area, wash house (laundry) | 1 | 2.1% | |
| 10 | Vehicle storage area; garage, carport | 1 | 2.1% | |
| 11 | All other areas | 5 | 10.4% |
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 Thornton mix.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 26 | 54.2% | |
| 2 | Heat source: other | 7 | 14.6% | |
| 3 | Heat from powered equipment, other | 4 | 8.3% | |
| 4 | Spark, ember or flame from operating equipment | 3 | 6.2% | |
| 5 | Hot or smoldering object, other | 3 | 6.2% | |
| 6 | Heat, spark from friction | 2 | 4.2% | |
| 7 | Radiated, conducted heat from operating equipment | 1 | 2.1% | |
| 8 | Molten, hot material | 1 | 2.1% | |
| 9 | Chemical reaction | 1 | 2.1% |
Largest single-incident property losses reported by Thornton departments in 2025. These 8 fires alone account for 95% of the city's annual total.
| # | Property loss | Type | Severity | Status |
|---|---|---|---|---|
| 1 | $80,000 | Road freight or transport vehicle fire | Significant | Investigated |
| 2 | $75,000 | Road freight or transport vehicle fire | Significant | Investigated |
| 3 | $45,000 | Passenger vehicle fire | Significant | Investigated |
| 4 | $40,000 | Building fires | Significant | Investigated |
| 5 | $10,000 | Fire in motor home, camper, recreational vehicle | Significant | Investigated |
| 6 | $10,000 | Building fires | Significant | Investigated |
| 7 | $10,000 | Grass fire | Significant | Investigated |
| 8 | $7,000 | Special outside fire, other | Significant | Investigated |
Per-capita rates let us compare apples to apples. Thornton sits above the national average for incidents per resident.
Top 25 wildfires (1992+) in the FPA-FOD ignitions database, scaled by acres. 268,235 acres burned in this 50-mile radius. Each dot is a fire — bigger dots burned more land.
| Year | Cause | Acres | Distance | |
|---|---|---|---|---|
| 2015 | Missing data/not specified/undetermined | 70,868 | 40.3 mi | |
| 2017 | Missing data/not specified/undetermined | 51,624 | 45.8 mi | |
| 1992 | Missing data/not specified/undetermined | 18,000 | 44.6 mi | |
| 2018 | Missing data/not specified/undetermined | 12,300 | 48.6 mi | |
| 2009 | Missing data/not specified/undetermined | 12,200 | 41.8 mi | |
| 2018 | Equipment and vehicle use | 11,789 | 28.8 mi | |
| 1996 | Arson/incendiarism | 9,820 | 27.9 mi | |
| 2015 | Equipment and vehicle use | 8,051 | 41.8 mi | |
| 2003 | Equipment and vehicle use | 6,804 | 43.6 mi | |
| 2001 | Equipment and vehicle use | 6,800 | 40.4 mi | |
| 2005 | Arson/incendiarism | 6,744 | 40.9 mi | |
| 2014 | Fireworks | 6,488 | 41.6 mi |
Top 6 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 Thornton. Useful comparison targets — same state, similar size, different fire profile.
1 departments report to NFIRS for incidents in Thornton.
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.