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 Diamond Bar responded to 75 fire and hazmat incidents — from cooking fires to gas leaks to a single $100K building blaze. Here's the full picture.
Passenger vehicle fire lead by count. Building fires lead by dollars. Together the top five categories make up about 44% of all calls.
Jan peaks. Mar dips. Watch for the typical fall climb starting in October.
267 incidents 2021–2025. Peak year was 2025. $4.3M cumulative property loss.
| Year | Incidents | YoY | |
|---|---|---|---|
| 2021 | 43 | — | |
| 2022 | 43 | +0.0% | |
| 2023 | 41 | -4.7% | |
| 2024 | 65 | +58.5% | |
| 2025 | 75 | +15.4% |
For the 5 building fires Diamond Bar departments responded to in 2025, here's how they were classified once investigators were finished.
NFIRS Area of Origin (AREA_ORIG) for the 123 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 | Engine area, running gear, wheel area | 36 | 29.3% | |
| 2 | Vehicle area, other | 15 | 12.2% | |
| 3 | Other | 11 | 8.9% | |
| 4 | Undetermined | 9 | 7.3% | |
| 5 | Vehicle storage area; garage, carport | 7 | 5.7% | |
| 6 | Cooking area, kitchen | 6 | 4.9% | |
| 7 | Operator/passenger area of transportation equip. | 5 | 4.1% | |
| 8 | Cargo/trunk area - all vehicles | 4 | 3.3% | |
| 9 | Outside area, other | 4 | 3.3% | |
| 10 | Bedroom - < 5 persons; included are jail or prison | 3 | 2.4% | |
| 11 | All other areas | 23 | 18.7% |
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 Diamond Bar mix.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Arcing | 27 | 22.0% | |
| 2 | Heat source: other | 24 | 19.5% | |
| 3 | Undetermined | 24 | 19.5% | |
| 4 | Heat from powered equipment, other | 15 | 12.2% | |
| 5 | Radiated, conducted heat from operating equipment | 10 | 8.1% | |
| 6 | Spark, ember or flame from operating equipment | 8 | 6.5% | |
| 7 | Hot or smoldering object, other | 7 | 5.7% | |
| 8 | Heat, spark from friction | 3 | 2.4% | |
| 9 | Heat from other open flame or smoking materials | 3 | 2.4% | |
| 10 | Hot ember or ash | 1 | 0.8% | |
| 11 | All other sources | 1 | 0.8% |
Largest single-incident property losses reported by Diamond Bar departments in 2025. These 8 fires alone account for 78% of the city's annual total.
| # | Property loss | Type | Severity | Status |
|---|---|---|---|---|
| 1 | $100,000 | Building fires | Significant | Investigated |
| 2 | $50,000 | Fires in structures other than in a building | Significant | Investigated |
| 3 | $50,000 | Fires in structures other than in a building | Significant | Investigated |
| 4 | $30,000 | Passenger vehicle fire | Significant | Investigated |
| 5 | $20,000 | Passenger vehicle fire | Significant | Investigated |
| 6 | $19,000 | Passenger vehicle fire | Significant | Investigated |
| 7 | $15,000 | Mobile property (vehicle) fire, other | Significant | Investigated |
| 8 | $15,000 | Mobile property (vehicle) fire, other | Significant | Investigated |
Per-capita rates let us compare apples to apples. Diamond Bar sits below the national average for incidents per resident.
Top 25 wildfires (1992+) in the FPA-FOD ignitions database, scaled by acres. 988,122 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 | 27.2 mi | |
| 2020 | Missing data/not specified/undetermined | 115,997 | 19.0 mi | |
| 2003 | Arson/incendiarism | 91,281 | 33.8 mi | |
| 1999 | Missing data/not specified/undetermined | 65,000 | 43.2 mi | |
| 2003 | Arson/incendiarism | 59,788 | 22.4 mi | |
| 2016 | Missing data/not specified/undetermined | 41,432 | 45.0 mi | |
| 2007 | Misuse of fire by a minor | 38,356 | 46.8 mi | |
| 2002 | Arson/incendiarism | 37,240 | 16.0 mi | |
| 2016 | Missing data/not specified/undetermined | 36,274 | 27.2 mi | |
| 2020 | Equipment and vehicle use | 33,424 | 48.8 mi | |
| 2008 | Missing data/not specified/undetermined | 30,305 | 9.8 mi | |
| 2007 | Missing data/not specified/undetermined | 28,476 | 19.5 mi |
Top 5 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 Diamond Bar. 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.