ZIP 20634 recorded 82 fire and hazmat incidents in 2025, 402 across 2021–2025. Primary county: St. Mary's County, MD. FEMA NRI rates wildfire risk here as Moderate.
402 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 68 | |
| 2022 | 76 | |
| 2023 | 89 | |
| 2024 | 87 | |
| 2025 | 82 |
Mar peaks. Feb dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 20634 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Gas leak (natural gas or LPG) | 106 | 26.4% | |
| 2 | Building fires | 94 | 23.4% | |
| 3 | Aircraft standby | 60 | 14.9% | |
| 4 | Brush, or brush and grass mixture fire | 19 | 4.7% | |
| 5 | Authorized controlled burning | 17 | 4.2% |
For the 17 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 20634 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Outside area, other | 14 | 21.5% | |
| 2 | Cooking area, kitchen | 13 | 20.0% | |
| 3 | Undetermined | 8 | 12.3% | |
| 4 | Wildland, woods | 7 | 10.8% | |
| 5 | Engine area, running gear, wheel area | 4 | 6.2% | |
| 6 | Other | 3 | 4.6% | |
| 7 | Highway, parking lot, street: on or near | 3 | 4.6% | |
| 8 | Open area - outside; included are farmland, field | 3 | 4.6% | |
| 9 | All other areas | 10 | 15.4% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 33 | 50.8% | |
| 2 | Radiated, conducted heat from operating equipment | 6 | 9.2% | |
| 3 | Hot ember or ash | 5 | 7.7% | |
| 4 | Hot or smoldering object, other | 4 | 6.2% | |
| 5 | Heat from powered equipment, other | 3 | 4.6% | |
| 6 | Spark, ember or flame from operating equipment | 3 | 4.6% | |
| 7 | Heat, spark from friction | 3 | 4.6% | |
| 8 | Cigarette lighter | 3 | 4.6% | |
| 9 | All other sources | 5 | 7.7% |
Largest single-incident losses in ZIP 20634 across 2021–2025. These 8 fires alone account for 103% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $476,400 | Building fires | 2025 | Major |
| 2 | $10,000 | Building fires | 2022 | Significant |
| 3 | $3,000 | Passenger vehicle fire | 2022 | Significant |
| 4 | $2,571 | Passenger vehicle fire | 2021 | Significant |
| 5 | $1,000 | Cooking fire, confined to container | 2025 | Significant |
| 6 | $500 | Dumpster or other outside trash receptacle fire | 2021 | Significant |
| 7 | $500 | Forest, woods or wildland fire | 2025 | Significant |
| 8 | $500 | Building fires | 2025 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 20634.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | California | 5 | |
| 2 | Lexington Park | 2 | |
| 3 | Hughesville | 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 — 402 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.