Louisa County, Virginia Natural Disaster Risk
FEMA National Risk Index assessment · VA
Very LowComposite Risk Score
National percentile: 32th
Louisa County faces very low composite natural disaster risk (NRI Risk Index score 32.2, 32th national percentile), driven primarily by hurricane and earthquake exposure. Expected annual loss across all 18 hazard types is $10M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Risk Overview
FEMA's National Risk Index rates Louisa County at very low composite risk, with a National Risk Index score of 32.2 out of 100 — placing it in the 32nd national percentile and among the lowest-risk counties in the country. The score blends Expected Annual Loss, Social Vulnerability, and Community Resilience across all 18 FEMA hazard types.
Risk here concentrates in hurricane (tropical cyclones bringing extreme wind, rain, and storm surge) at Low risk — $2M in expected annual loss and about 0.08 events per year; earthquake (ground shaking from sudden movement along geologic faults) at Low risk — $1M in expected annual loss and about 0.00 events per year; and lightning (electrical discharges from storms that ignite fires and cause casualties) at Medium risk — $543K in expected annual loss and about 40.46 events per year. Across all hazards, FEMA estimates $10M in expected annual loss for a population of 38K.
Beyond physical exposure, Louisa County has a medium social vulnerability rating (how susceptible the population is to harm) and a high community resilience rating (its capacity to prepare for and recover from disasters). A less vulnerable population paired with strong resilience helps the community absorb and recover from events.
The county's disaster history tells the same story: Louisa County has received 25 federal disaster declarations since 1969, including 7 for hurricane events and 6 for snowstorm events. The most recent was Severe Winter Storm (winter storm), declared in January 2026.
Among 133 Virginia counties, Louisa County ranks #61 for overall natural disaster risk.
Top Hazards
All 18 Hazard Risks
| Hurricane | Low | 0.08 / yr | $2M |
| Earthquake | Low | 0.00 / yr | $1M |
| Lightning | Medium | 40.46 / yr | $543K |
| Drought | Medium | 4.88 / yr | $457K |
| Strong Wind | Low | 3.48 / yr | $551K |
| Heat Wave | Low | 3.64 / yr | $241K |
| Riverine Flood | Low | 0.54 / yr | $4M |
| Tornado | Low | 0.26 / yr | $603K |
| Landslide | Very Low | 0.44 / yr | $381 |
| Ice Storm | Low | 0.79 / yr | $32K |
| Hail | Very Low | 2.85 / yr | $104K |
| Wildfire | Very Low | 0.00 / yr | $9K |
| Winter Weather | Very Low | 6.29 / yr | $9K |
| Cold Wave | Very Low | 0.68 / yr | $27K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Disaster History
Louisa County has received 25 federal disaster declarations since 1969, most recently Severe Winter Storm in January 2026. Most frequent causes: Hurricane (7), Snowstorm (6), Severe Storm (4).
| Declared | Type | Disaster |
|---|---|---|
| January 2026 | Winter Storm | Severe Winter Storm |
| March 2022 | Severe Storm | Severe Winter Storm and Snowstorm |
| May 2021 | Severe Ice Storm | Severe Winter Storms |
| April 2020 | Biological | Covid-19 Pandemic |
| March 2020 | Biological | Covid-19 |
| September 2018 | Hurricane | Hurricane Florence |
| March 2016 | Snowstorm | Severe Winter Storm and Snowstorm |
| October 2012 | Hurricane | Hurricane Sandy |
| July 2012 | Severe Storm | Severe Storms and Straight-Line Winds |
| November 2011 | Earthquake | Earthquake |
Showing the 10 most recent of 25 declarations.
Source: FEMA Disaster Declarations Summaries (OpenFEMA).
Frequently Asked Questions
What is the overall natural disaster risk for Louisa County?
Louisa County has a composite FEMA National Risk Index score of 32.2 out of 100, placing it in the Very Low category and the 32th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Louisa County?
The three highest-rated hazards are Hurricane (Low, $2M EAL), Earthquake (Low, $1M EAL), Lightning (Medium, $543K EAL). These account for most of the county's expected annual losses.
How does Louisa County compare to other Virginia counties?
Louisa County ranks #61 of 133 Virginia counties for overall natural disaster risk, with a very low rating.
How many federally declared disasters has Louisa County had?
FEMA records 25 federal disaster declarations for Louisa County since 1969, most often 7 for hurricane events and 6 for snowstorm events. The most recent was Severe Winter Storm, declared in January 2026.
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. Louisa County's $10M EAL is a statistical average, not a guarantee for any specific year or address.