Natural disaster risk in Prince William County, Virginia
Virginia · population 481,359 · FIPS 51153
Overall: relatively moderate risk
Prince William County has a composite risk score of 83.2 out of 100 — higher than 83% of US counties. It ranks 4 of 133 in Virginia (1 = highest risk). Its highest-rated hazards are lightning, winter weather, strong wind.
Drought now: No, but abnormally dry (D0)
No drought, but abnormally dry. On the U.S. Drought Monitor map valid 13 October 2026, 4.75% of Prince William County is D0 Abnormally Dry and none of it is in drought (D1 to D4). Some of it has been abnormally dry or worse for at least 54 weeks in a row.
Drought in Prince William County: the last 52 weeks · droughtmonitor.unl.edu
The U.S. Drought Monitor is jointly produced by the National Drought Mitigation Center at the University of Nebraska-Lincoln, the United States Department of Agriculture, the National Oceanic and Atmospheric Administration and the National Aeronautics and Space Administration. Map courtesy of NDMC.
Risk, loss, vulnerability and resilience
| Measure | Rating and score |
|---|---|
| Overall risk Expected annual loss, adjusted for social vulnerability and community resilience. |
Relatively moderate 83.2 |
| Expected annual loss About $69.0 million a year, on average, across all 18 hazards. |
Relatively moderate 87.7 |
| Social vulnerability Higher means people may find it harder to prepare and recover. |
Very low 10.6 |
| Community resilience Higher means a stronger ability to prepare, adapt and recover. |
Relatively moderate 40.2 |
Risk by hazard
FEMA's risk rating for each of 18 natural hazards in Prince William County, highest first. "Not applicable" means the hazard is not modelled here.
| Hazard | Risk rating and score |
|---|---|
| Lightning | Relatively high 91 |
| Winter weather | Relatively high 90 |
| Strong wind | Relatively high 88 |
| Heat wave | Relatively moderate 93 |
| Inland (riverine) flooding | Relatively moderate 87 |
| Hurricane | Relatively moderate 82 |
| Hail | Relatively moderate 76 |
| Tornado | Relatively moderate 76 |
| Earthquake | Relatively low 80 |
| Ice storm | Relatively low 56 |
| Drought | Relatively low 54 |
| Coastal flooding | Relatively low 48 |
| Landslide | Very low 57 |
| Cold wave | Very low 23 |
| Wildfire | Very low 18 |
| Avalanche | Not applicable |
| Tsunami | Insufficient data |
| Volcanic activity | Not applicable |
FEMA disaster declarations for Prince William County
Federal declarations that designated Prince William County, since 1 Jan 2024 (the period this site keeps from OpenFEMA). Older declarations are in FEMA's own dataset.
Yes. Prince William County has been named in 1 FEMA declaration since 1 Jan 2024. The latest is EM-3631-VA (Severe Winter Storm), declared 23 Jan 2026.
| Declaration | Kind | Incident | Declared | Individual assistance here |
|---|---|---|---|---|
| EM-3631-VA | Emergency | Severe Winter Storm | 23 Jan 2026 | No |
All FEMA declarations in Virginia, with estimated apply-by dates · Open FEMA deadlines
This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s). Dataset: Disaster Declarations Summaries - v2.
How to read these ratings
- Ratings run in five steps: very low, relatively low, relatively moderate, relatively high and very high. They compare a county with every other US county; they are not a measure of danger on their own.
- Scores run from 0 to 100 and are national percentiles. The bar shows the score: a score of 80 means a higher value than 80% of US counties.
- Overall risk combines the expected annual loss with social vulnerability and community resilience.
- Expected annual loss is the average yearly loss to buildings, people and agriculture the model expects from all 18 hazards.
- Social vulnerability describes how hard it may be for people to prepare for and recover from a disaster. Higher is worse.
- Community resilience describes a community's ability to prepare, adapt and recover. Higher is better.
- "Not applicable" means FEMA does not model that hazard there (for example, hurricanes far inland).
About this data
Source: FEMA National Risk Index, version 1.20, released December 2025, published by the Federal Emergency Management Agency (US public domain). About the National Risk Index. The index is a model of relative risk built from historical hazard records, what is exposed and community factors. It is not a forecast, it does not describe any single property, and it is not insurance or financial advice. For decisions about a specific address, check FEMA's flood maps and your local emergency management office.
Questions
What is the natural disaster risk in Prince William County, Virginia?
FEMA's National Risk Index rates the overall risk in Prince William County as relatively moderate, with a score of 83.2 out of 100 (higher than 83% of US counties). That is a comparison with other US counties, not a forecast.
What are the biggest natural hazards in Prince William County?
The hazards rated highest for Prince William County are lightning (relatively high), winter weather (relatively high), strong wind (relatively high).
What is the flood risk in Prince William County?
FEMA rates inland (river and rain) flooding risk in Prince William County as relatively moderate, and coastal flooding risk as relatively low. For a specific property, check the FEMA flood map and your local floodplain office.
Has Prince William County had a FEMA disaster declaration?
Yes. Prince William County has been named in 1 FEMA declaration since 1 Jan 2024. The latest is EM-3631-VA (Severe Winter Storm), declared 23 Jan 2026.
Is Prince William County in a drought?
No drought, but abnormally dry. On the U.S. Drought Monitor map valid 13 October 2026, 4.75% of Prince William County is D0 Abnormally Dry and none of it is in drought (D1 to D4). Some of it has been abnormally dry or worse for at least 54 weeks in a row.
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