ZIP 02155 recorded 743 fire and hazmat incidents in 2025, 3,487 across 2021–2025. Primary county: Middlesex County, MA. FEMA NRI rates wildfire risk here as High.
3,487 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 819 | |
| 2022 | 580 | |
| 2023 | 640 | |
| 2024 | 705 | |
| 2025 | 743 |
Jun peaks. Feb dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 02155 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Hazardous condition, other | 1,216 | 34.9% | |
| 2 | Cooking fire, confined to container | 466 | 13.4% | |
| 3 | Gas leak (natural gas or LPG) | 428 | 12.3% | |
| 4 | Unauthorized burning | 155 | 4.4% | |
| 5 | Building fires | 148 | 4.2% |
For the 25 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 02155 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Outside area, other | 107 | 25.1% | |
| 2 | Engine area, running gear, wheel area | 63 | 14.8% | |
| 3 | Wildland, woods | 41 | 9.6% | |
| 4 | Undetermined | 37 | 8.7% | |
| 5 | Cooking area, kitchen | 28 | 6.6% | |
| 6 | Exterior balcony, unenclosed porch | 17 | 4.0% | |
| 7 | Open area - outside; included are farmland, field | 14 | 3.3% | |
| 8 | Highway, parking lot, street: on or near | 13 | 3.1% | |
| 9 | All other areas | 106 | 24.9% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 286 | 67.1% | |
| 2 | Cigarette | 31 | 7.3% | |
| 3 | Heat from powered equipment, other | 22 | 5.2% | |
| 4 | Arcing | 21 | 4.9% | |
| 5 | Heat source: other | 14 | 3.3% | |
| 6 | Heat from direct flame, convection currents | 8 | 1.9% | |
| 7 | Radiated, conducted heat from operating equipment | 7 | 1.6% | |
| 8 | Candle | 6 | 1.4% | |
| 9 | All other sources | 31 | 7.3% |
Largest single-incident losses in ZIP 02155 across 2021–2025. These 8 fires alone account for 1201% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $1,200,000 | Building fires | 2024 | Major |
| 2 | $916,700 | Building fires | 2023 | Major |
| 3 | $750,000 | Building fires | 2023 | Major |
| 4 | $750,000 | Building fires | 2024 | Major |
| 5 | $600,000 | Building fires | 2023 | Major |
| 6 | $400,000 | Building fires | 2023 | Major |
| 7 | $100,000 | Building fires | 2024 | Significant |
| 8 | $100,000 | Fire, other | 2025 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 02155.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Medford | 3,471 | |
| 2 | Somerville | 15 | |
| 3 | Boston | 1 |
The figures above are historical. For today's air quality, fire-weather warnings, and active fires, go to the official sources.
NFIRS reports each fire incident with a 5-digit address ZIP. We aggregate those rows directly to produce ZIP-level totals — 3,487 incidents in this ZIP across 2021–2025. Building-fire breakdowns (Area of Origin, Heat Source, ignition cause) only count fires investigators classified beyond the basic incident report. Because NFIRS reporting is voluntary, totals are a strong indicator rather than a complete census.