In 2025, fire departments serving Severn responded to 186 fire and hazmat incidents — from cooking fires to gas leaks to a single $390K 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 55% of all calls.
Feb peaks. Dec dips. Watch for the typical fall climb starting in October.
757 incidents 2021–2025. Peak year was 2024. $1.8M cumulative property loss.
| Year | Incidents | YoY | |
|---|---|---|---|
| 2021* | 60 | — | |
| 2022 | 117 | — | |
| 2023 | 167 | +42.7% | |
| 2024 | 227 | +35.9% | |
| 2025 | 186 | -18.1% |
* Well below Severn'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 22 building fires Severn departments responded to in 2025, here's how they were classified once investigators were finished.
NFIRS Area of Origin (AREA_ORIG) for the 135 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 | 22 | 16.3% | |
| 2 | Engine area, running gear, wheel area | 19 | 14.1% | |
| 3 | Open area - outside; included are farmland, field | 19 | 14.1% | |
| 4 | Undetermined | 17 | 12.6% | |
| 5 | Other | 6 | 4.4% | |
| 6 | Wildland, woods | 6 | 4.4% | |
| 7 | Cooking area, kitchen | 5 | 3.7% | |
| 8 | Exterior balcony, unenclosed porch | 4 | 3.0% | |
| 9 | Common room, den, family room, living room, lounge | 3 | 2.2% | |
| 10 | Bedroom - < 5 persons; included are jail or prison | 3 | 2.2% | |
| 11 | All other areas | 31 | 23.0% |
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 Severn mix.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 68 | 50.4% | |
| 2 | Heat from powered equipment, other | 9 | 6.7% | |
| 3 | Hot ember or ash | 9 | 6.7% | |
| 4 | Cigarette | 8 | 5.9% | |
| 5 | Heat source: other | 7 | 5.2% | |
| 6 | Arcing | 7 | 5.2% | |
| 7 | Radiated, conducted heat from operating equipment | 5 | 3.7% | |
| 8 | Spark, ember or flame from operating equipment | 4 | 3.0% | |
| 9 | Cigarette lighter | 4 | 3.0% | |
| 10 | Hot or smoldering object, other | 3 | 2.2% | |
| 11 | All other sources | 11 | 8.1% |
Largest single-incident property losses reported by Severn departments in 2025. These 8 fires alone account for 97% of the city's annual total.
| # | Property loss | Type | Severity | Status |
|---|---|---|---|---|
| 1 | $390,400 | Building fires | Major | Investigated |
| 2 | $300,000 | Building fires | Major | Investigated |
| 3 | $300,000 | Building fires | Major | Investigated |
| 4 | $80,000 | Building fires | Significant | Investigated |
| 5 | $65,000 | Passenger vehicle fire | Significant | Investigated |
| 6 | $30,000 | Building fires | Significant | Investigated |
| 7 | $15,000 | Passenger vehicle fire | Significant | Investigated |
| 8 | $10,000 | Mobile property (vehicle) fire, other | Significant | Investigated |
Per-capita rates let us compare apples to apples. Severn sits below the national average for incidents per resident.
Top 25 wildfires (1992+) in the FPA-FOD ignitions database, scaled by acres. 3,679 acres burned in this 50-mile radius. Each dot is a fire — bigger dots burned more land.
| Year | Cause | Acres | Distance | |
|---|---|---|---|---|
| 2001 | Arson/incendiarism | 522 | 35.8 mi | |
| 2011 | Recreation and ceremony | 500 | 7.7 mi | |
| 2011 | Missing data/not specified/undetermined | 461 | 31.5 mi | |
| 2011 | Missing data/not specified/undetermined | 431 | 31.6 mi | |
| 2003 | Missing data/not specified/undetermined | 408 | 19.0 mi | |
| 2011 | Missing data/not specified/undetermined | 344 | 40.4 mi | |
| 2011 | Natural | 150 | 34.6 mi | |
| 2001 | Arson/incendiarism | 100 | 19.0 mi | |
| 2018 | Debris and open burning | 76 | 42.2 mi | |
| 2019 | Equipment and vehicle use | 67 | 37.3 mi | |
| 2020 | Debris and open burning | 60 | 49.3 mi | |
| 2006 | Missing data/not specified/undetermined | 59 | 4.0 mi |
Top 2 ZIP codes by NFIRS incident count across 2021–2025. Each ZIP has its own fire profile — dive in for neighborhood-level context.
Six Maryland cities with population within ±25% of Severn. 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.