In 2025, fire departments serving Derry responded to 20 fire and hazmat incidents . Here's the full picture.
Incomplete 2025 data. Derry's departments reported 20 incidents to NFIRS for 2025, against about 90 in a typical year, so 2025 figures on this page undercount. The 2021–2025 totals are the better guide.
Power line down lead by count. Building fires lead by dollars. Together the top five categories make up about 75% of all calls.
Mar peaks. Jan dips. Watch for the typical fall climb starting in October.
449 incidents 2021–2025. Peak year was 2021. 2 civilian deaths.
| Year | Incidents | YoY | |
|---|---|---|---|
| 2021 | 149 | — | |
| 2022 | 122 | -18.1% | |
| 2023 | 113 | -7.4% | |
| 2024* | 45 | — | |
| 2025* | 20 | — |
* Well below Derry'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 3 building fires Derry departments responded to in 2025, here's how they were classified once investigators were finished.
NFIRS Area of Origin (AREA_ORIG) for the 37 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 | 7 | 18.9% | |
| 2 | Vehicle area, other | 4 | 10.8% | |
| 3 | Other | 3 | 8.1% | |
| 4 | Undetermined | 3 | 8.1% | |
| 5 | Bedroom - < 5 persons; included are jail or prison | 2 | 5.4% | |
| 6 | Storage area, other | 2 | 5.4% | |
| 7 | Structural area, other | 2 | 5.4% | |
| 8 | Entrance way, lobby | 1 | 2.7% | |
| 9 | Assembly or sales area, other | 1 | 2.7% | |
| 10 | Common room, den, family room, living room, lounge | 1 | 2.7% | |
| 11 | All other areas | 11 | 29.7% |
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 Derry mix.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Heat source: other | 15 | 40.5% | |
| 2 | Undetermined | 5 | 13.5% | |
| 3 | Hot or smoldering object, other | 3 | 8.1% | |
| 4 | Heat from powered equipment, other | 2 | 5.4% | |
| 5 | Arcing | 2 | 5.4% | |
| 6 | Cigarette | 2 | 5.4% | |
| 7 | Multiple heat sources including multiple ignitions | 2 | 5.4% | |
| 8 | Hot ember or ash | 1 | 2.7% | |
| 9 | Match | 1 | 2.7% | |
| 10 | Cigarette lighter | 1 | 2.7% | |
| 11 | All other sources | 3 | 8.1% |
Per-capita rates let us compare apples to apples. Derry sits below the national average for incidents per resident.
Top 25 wildfires (1992+) in the FPA-FOD ignitions database, scaled by acres. 3,784 acres burned in this 50-mile radius. Each dot is a fire — bigger dots burned more land.
| Year | Cause | Acres | Distance | |
|---|---|---|---|---|
| 2006 | Missing data/not specified/undetermined | 935 | 12.6 mi | |
| 2012 | Missing data/not specified/undetermined | 741 | 47.4 mi | |
| 2017 | Arson/incendiarism | 282 | 47.4 mi | |
| 2005 | Arson/incendiarism | 263 | 46.6 mi | |
| 2008 | Recreation and ceremony | 193 | 37.6 mi | |
| 2015 | Arson/incendiarism | 184 | 45.6 mi | |
| 2006 | Missing data/not specified/undetermined | 109 | 34.6 mi | |
| 2012 | Missing data/not specified/undetermined | 100 | 9.9 mi | |
| 2015 | Missing data/not specified/undetermined | 90 | 13.2 mi | |
| 2008 | Debris and open burning | 75 | 48.5 mi | |
| 2020 | Debris and open burning | 74 | 18.9 mi | |
| 2016 | Arson/incendiarism | 72 | 48.2 mi |
Top 7 ZIP codes by NFIRS incident count across 2021–2025. Each ZIP has its own fire profile — dive in for neighborhood-level context.
Six Pennsylvania cities with population within ±25% of Derry. Useful comparison targets — same state, similar size, different fire profile.
2 departments report to NFIRS for incidents in Derry.
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.