ZIP 20621 recorded 13 fire and hazmat incidents in 2025, 83 across 2021–2025. Primary county: St. Mary's County, MD. FEMA NRI rates wildfire risk here as Moderate.
83 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 15 | |
| 2022 | 18 | |
| 2023 | 21 | |
| 2024 | 16 | |
| 2025 | 13 |
Feb peaks. Nov dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 20621 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Aircraft standby | 23 | 27.7% | |
| 2 | Building fires | 19 | 22.9% | |
| 3 | Hazardous condition, other | 14 | 16.9% | |
| 4 | Passenger vehicle fire | 6 | 7.2% | |
| 5 | Authorized controlled burning | 4 | 4.8% |
For the 0 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 20621 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Operator/passenger area of transportation equip. | 2 | 22.2% | |
| 2 | Open area - outside; included are farmland, field | 2 | 22.2% | |
| 3 | Exterior balcony, unenclosed porch | 1 | 11.1% | |
| 4 | Ceiling & floor assembly, crawl space b/t stories | 1 | 11.1% | |
| 5 | Vehicle area, other | 1 | 11.1% | |
| 6 | Engine area, running gear, wheel area | 1 | 11.1% | |
| 7 | Wildland, woods | 1 | 11.1% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 2 | 22.2% | |
| 2 | Heat from powered equipment, other | 1 | 11.1% | |
| 3 | Spark, ember or flame from operating equipment | 1 | 11.1% | |
| 4 | Arcing | 1 | 11.1% | |
| 5 | Hot ember or ash | 1 | 11.1% | |
| 6 | Cigarette | 1 | 11.1% | |
| 7 | Cigarette lighter | 1 | 11.1% | |
| 8 | Backfire from internal combustion engine | 1 | 11.1% |
Largest single-incident losses in ZIP 20621 across 2021–2025. These 2 fires alone account for 0% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $2,000 | Passenger vehicle fire | 2024 | Significant |
| 2 | $1 | Unauthorized burning | 2024 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 20621.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Mechanicsville | 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 — 83 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.