King William County
Virginia — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 8th
King William County faces very low composite natural disaster risk (NRI Risk Index score 8.3, 8th national percentile), driven primarily by drought and hurricane exposure. Expected annual loss across all 18 hazard types is $6M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Drought | Medium | 4.48 / yr | $2M |
| Hurricane | Low | 0.15 / yr | $459K |
| Coastal Flood | Low | 3.69 / yr | $206K |
| Earthquake | Very Low | 0.00 / yr | $184K |
| Landslide | Very Low | 0.18 / yr | $553 |
| Heat Wave | Very Low | 5.05 / yr | $161K |
| Ice Storm | Very Low | 1.15 / yr | $29K |
| Tornado | Very Low | 0.18 / yr | $333K |
| Riverine Flood | Very Low | 0.54 / yr | $3M |
| Lightning | Very Low | 42.79 / yr | $70K |
| Strong Wind | Very Low | 1.68 / yr | $152K |
| Wildfire | Very Low | 0.00 / yr | $4K |
| Winter Weather | Very Low | 5.17 / yr | $9K |
| Hail | Very Low | 2.29 / yr | $37K |
| Cold Wave | Very Low | 0.61 / yr | $13K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for King William County?
King William County has a composite FEMA National Risk Index score of 8.3 out of 100, placing it in the Very Low category and the 8th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in King William County?
The three highest-rated hazards are Drought (Medium, $2M EAL), Hurricane (Low, $459K EAL), Coastal Flood (Low, $206K EAL). These account for most of the county's expected annual losses.
How does King William County compare to other Virginia counties?
King William County ranks #112 of 133 Virginia counties for overall natural disaster risk, with a very low rating.
What does Expected Annual Loss (EAL) mean?
EAL is FEMA's estimate of average annual dollar losses from natural hazards, calculated from historical event data and exposure models. King William County's $6M EAL is a statistical average, not a guarantee for any specific year or address.