In 2025, fire departments serving Marlborough responded to 343 fire and hazmat incidents — from cooking fires to gas leaks to a single $460K building blaze. Here's the full picture.
Hazardous condition, other lead by count. Building fires lead by dollars. Together the top five categories make up about 53% of all calls.
Aug peaks. Feb dips. Watch for the typical fall climb starting in October.
1,816 incidents 2021–2025. Peak year was 2022. $6.0M cumulative property loss. 2 civilian deaths.
| Year | Incidents | YoY | |
|---|---|---|---|
| 2021 | 333 | — | |
| 2022 | 402 | +20.7% | |
| 2023 | 360 | -10.4% | |
| 2024 | 378 | +5.0% | |
| 2025 | 343 | -9.3% |
For the 14 building fires Marlborough departments responded to in 2025, here's how they were classified once investigators were finished.
NFIRS Area of Origin (AREA_ORIG) for the 455 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 | Outside area, other | 115 | 25.3% | |
| 2 | Undetermined | 80 | 17.6% | |
| 3 | Cooking area, kitchen | 43 | 9.5% | |
| 4 | Vehicle area, other | 28 | 6.2% | |
| 5 | Highway, parking lot, street: on or near | 26 | 5.7% | |
| 6 | Other | 24 | 5.3% | |
| 7 | Wildland, woods | 22 | 4.8% | |
| 8 | Open area - outside; included are farmland, field | 15 | 3.3% | |
| 9 | Engine area, running gear, wheel area | 14 | 3.1% | |
| 10 | Bathroom, checkroom, lavatory, locker room | 11 | 2.4% | |
| 11 | All other areas | 77 | 16.9% |
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 Marlborough mix.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 219 | 48.1% | |
| 2 | Cigarette | 68 | 14.9% | |
| 3 | Heat source: other | 37 | 8.1% | |
| 4 | Heat from powered equipment, other | 20 | 4.4% | |
| 5 | Hot or smoldering object, other | 18 | 4.0% | |
| 6 | Arcing | 15 | 3.3% | |
| 7 | Hot ember or ash | 12 | 2.6% | |
| 8 | Radiated, conducted heat from operating equipment | 11 | 2.4% | |
| 9 | Spark, ember or flame from operating equipment | 10 | 2.2% | |
| 10 | Heat from other open flame or smoking materials | 7 | 1.5% | |
| 11 | All other sources | 38 | 8.4% |
Largest single-incident property losses reported by Marlborough departments in 2025. These 7 fires alone account for 100% of the city's annual total.
| # | Property loss | Type | Severity | Status |
|---|---|---|---|---|
| 1 | $460,000 | Building fires | Major | Investigated |
| 2 | $100,000 | Building fires | Significant | Investigated |
| 3 | $75,000 | Building fires | Significant | Investigated |
| 4 | $50,000 | Building fires | Significant | Investigated |
| 5 | $10,000 | Brush, or brush and grass mixture fire | Significant | Investigated |
| 6 | $2,500 | Fires in structures other than in a building | Significant | Investigated |
| 7 | $2,000 | Brush, or brush and grass mixture fire | Significant | Investigated |
Per-capita rates let us compare apples to apples. Marlborough sits above the national average for incidents per resident.
18 fire-related casualties recorded in NFIRS Module 11 across the 2021–2025 window. Age, gender, and severity are coarse-binned — no individual identification possible.
| Age | Count | |
|---|---|---|
| 0-9 | 1 | |
| 10-19 | 0 | |
| 20-29 | 2 | |
| 30-39 | 6 | |
| 40-49 | 2 | |
| 50-59 | 4 | |
| 60-69 | 2 | |
| 70-79 | 1 | |
| 80+ | 0 |
Top 25 wildfires (1992+) in the FPA-FOD ignitions database, scaled by acres. 3,835 acres burned in this 50-mile radius. Each dot is a fire — bigger dots burned more land.
| Year | Cause | Acres | Distance | |
|---|---|---|---|---|
| 2005 | Missing data/not specified/undetermined | 800 | 11.2 mi | |
| 2008 | Missing data/not specified/undetermined | 700 | 11.3 mi | |
| 2003 | Missing data/not specified/undetermined | 300 | 19.3 mi | |
| 2002 | Missing data/not specified/undetermined | 300 | 11.3 mi | |
| 2014 | Missing data/not specified/undetermined | 256 | 11.2 mi | |
| 2015 | Missing data/not specified/undetermined | 250 | 11.9 mi | |
| 2007 | Missing data/not specified/undetermined | 186 | 32.7 mi | |
| 2016 | Missing data/not specified/undetermined | 172 | 11.3 mi | |
| 2004 | Missing data/not specified/undetermined | 120 | 38.1 mi | |
| 2014 | Missing data/not specified/undetermined | 90 | 32.4 mi | |
| 2020 | Missing data/not specified/undetermined | 79 | 11.3 mi | |
| 2018 | Debris and open burning | 58 | 10.1 mi |
Top 3 ZIP codes by NFIRS incident count across 2021–2025. Each ZIP has its own fire profile — dive in for neighborhood-level context.
Six Massachusetts cities with population within ±25% of Marlborough. 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.