ZIP 20877 recorded 116 fire and hazmat incidents in 2025, 672 across 2021–2025. Primary county: Montgomery County, MD.
672 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 116 | |
| 2022 | 136 | |
| 2023 | 152 | |
| 2024 | 152 | |
| 2025 | 116 |
Aug peaks. Jan dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 20877 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Gas leak (natural gas or LPG) | 184 | 27.4% | |
| 2 | Hazardous condition, other | 109 | 16.2% | |
| 3 | Passenger vehicle fire | 46 | 6.8% | |
| 4 | Building fires | 41 | 6.1% | |
| 5 | Electrical wiring/equipment problem, other | 41 | 6.1% |
For the 6 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 20877 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Cooking area, kitchen | 36 | 20.6% | |
| 2 | Engine area, running gear, wheel area | 33 | 18.9% | |
| 3 | Outside area, other | 17 | 9.7% | |
| 4 | Undetermined | 13 | 7.4% | |
| 5 | Other | 12 | 6.9% | |
| 6 | Highway, parking lot, street: on or near | 9 | 5.1% | |
| 7 | Chute/container - trash, rubbish, waste | 8 | 4.6% | |
| 8 | Vehicle area, other | 6 | 3.4% | |
| 9 | All other areas | 41 | 23.4% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 74 | 42.3% | |
| 2 | Heat from powered equipment, other | 18 | 10.3% | |
| 3 | Hot or smoldering object, other | 17 | 9.7% | |
| 4 | Radiated, conducted heat from operating equipment | 14 | 8.0% | |
| 5 | Arcing | 10 | 5.7% | |
| 6 | Heat source: other | 8 | 4.6% | |
| 7 | Hot ember or ash | 6 | 3.4% | |
| 8 | Cigarette | 4 | 2.3% | |
| 9 | All other sources | 24 | 13.7% |
Largest single-incident losses in ZIP 20877 across 2021–2025. These 8 fires alone account for 687% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $1,000,000 | Building fires | 2022 | Major |
| 2 | $750,000 | Building fires | 2022 | Major |
| 3 | $500,000 | Building fires | 2022 | Major |
| 4 | $300,000 | Building fires | 2025 | Major |
| 5 | $125,000 | Building fires | 2022 | Significant |
| 6 | $80,000 | Building fires | 2023 | Significant |
| 7 | $75,000 | Building fires | 2023 | Significant |
| 8 | $50,000 | Building fires | 2023 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 20877.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Gaithersburg | 659 | |
| 2 | Rockville | 4 | |
| 3 | Bethesda | 2 | |
| 4 | Derwood | 2 | |
| 5 | Montgomery Village | 2 |
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 — 672 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.