Alleghany County, Virginia: Natural Disaster Risk and History
Alleghany County, Virginia has a Very Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 38.1 out of 100, higher than about 38% of US counties, with strong winds, landslides and avalanches scoring highest of its 18 hazards and $11 million a year in expected losses.
OpenFEMA lists 18 federal disaster declarations that included Alleghany County since 1969, not counting 2 for COVID-19; the latest is EM-3631-VA (Severe Winter Storm, declared 23 January 2026). NOAA's Storm Prediction Center has no tornado on record touching Alleghany County from 1950 to 2025.
Live weather alerts for Virginia All official warnings Latest FEMA declarations
Population 15,205 Buildings worth $3.5 billion Area 454 sq mi Risk rank in Virginia 52 of 133 FIPS 51005
All 18 hazards, highest risk first
FEMA National Risk Index| Hazard | Risk rating | Score | Expected loss a year | How often | Events in record |
|---|---|---|---|---|---|
| Strong wind | Relatively High | 88.5 | $1.7 million | about 2.4 a year | 91 |
| Landslide | Relatively Low | 83.6 | $22,900 | about 1.2 a year | — |
| Avalanche | Relatively Low | 67.8 | $3,219 | about once every 100 years | 0 |
| Lightning | Relatively Moderate | 62.8 | $336,327 | about 42 a year | 37,146 strikes |
| Inland flooding | Relatively Low | 56.3 | $7.3 million | about 1.1 a year | 30 |
| Cold wave | Relatively Low | 55.8 | $1.1 million | about 4.9 a year | 93 |
| Hurricane | Very Low | 54.9 | $110,245 | about once every 46 years | 6 |
| Winter weather | Relatively Low | 35.0 | $33,444 | about 13 a year | 252 |
| Earthquake | Very Low | 34.2 | $95,205 | rarer than once in 1,000 years | — |
| Drought | Very Low | 26.6 | $14,352 | about 1.6 a year | 63 |
| Wildfire | Very Low | 18.1 | $5,849 | about once every 926 years | — |
| Hail | Very Low | 16.0 | $50,329 | about 3 a year | 113 |
| Ice storm | Very Low | 15.1 | $8,623 | about once every 2.2 years | 31 |
| Tornado | Very Low | 9.4 | $51,706 | about once every 20 years | 0 |
| Heat wave | Very Low | 3.7 | $2,840 | about once every 9.4 years | 2 |
| Coastal flooding | Not Applicable | — | — | — | — |
| Tsunami | Not Applicable | — | — | — | — |
| Volcanic activity | Not Applicable | — | — | — | — |
Score: FEMA's percentile among US counties that face the hazard (higher = more risk). Expected loss: FEMA's modelled average yearly loss to buildings, people (as a statistical value) and crops. How often: FEMA's annualised frequency of the hazard in the county; for some hazards it counts event-days, so it is a rough guide, not a forecast. "Not Applicable" means FEMA does not model that hazard here.
Federal disaster declarations 18
Most common: Hurricane 5, Severe Storm 4, Snowstorm 4, Flood 3.
| Decade | Declarations | Incident types |
|---|---|---|
| 1960s | 1 | Hurricane |
| 1970s | 2 | Drought, Flood |
| 1980s | 1 | Flood |
| 1990s | 5 | Snowstorm ×3, Hurricane, Flood |
| 2000s | 4 | Severe Storm ×3, Hurricane |
| 2010s | 4 | Hurricane ×2, Severe Storm, Snowstorm |
| 2020s | 1 | Winter Storm |
The last 10
Widest declarations that included Alleghany County
- Severe Winter Storm (2026, EM-3631-VA): 133 Virginia counties designated.
- Hurricane Florence (2018, EM-3403-VA): 133 Virginia counties designated.
- Hurricane Sandy (2012, EM-3359-VA): 133 Virginia counties designated.
Named storms in its declarations: Hurricane Florence (2018), Hurricane Sandy (2012), Hurricane Katrina (2005), Hurricane Jeanne (2004), Hurricane Fran (1996), Tropical Storm Agnes (1972).
Not counted above: 2 COVID-19 ("Biological") declarations — in 2020 every US county was included. Virginia also had 3 statewide declarations with no county list.
Tornado record since 1950 0
No tornado in NOAA's Storm Prediction Center record touched Alleghany County between 1950 and 2025. That does not mean one cannot happen.
How Alleghany County compares with its 5 nearest counties
| County | Distance | Overall risk | Score | Top hazard |
|---|---|---|---|---|
| Alleghany County (this page) | — | Very Low | 38.1 | Strong wind |
| Covington City | 2 km | Very Low | 9.7 | Strong wind |
| Botetourt County | 31 km | Very Low | 18.1 | Landslide |
| Bath County | 38 km | Very Low | 5.4 | Landslide |
| Craig County | 39 km | Very Low | 6.2 | Landslide |
| Greenbrier County, WV | 43 km | Relatively Low | 75.8 | Landslide |
Nearest by distance between county centres. Every county in Virginia, ranked.
Vulnerability and resilience
| Social vulnerability | Relatively Moderate 51.7 |
|---|---|
| Community resilience | Relatively Moderate 46.3 |
| Community risk factor | 1.15 |
| Expected annual loss, all hazards | $11 million |
FEMA scales expected losses up where social vulnerability is high (people who may find it harder to prepare, evacuate or recover) and down where community resilience is high. A factor above 1 raises the risk score. For social vulnerability a high rating is worse; for resilience a high rating is better.
Prepare for Alleghany County's main hazards
- Right now: National Weather Service alerts for Virginia · all official warnings on Global Incident Tracker.
- Strong wind: Power outages now
- Landslide: Landslides recorded
- Avalanche: Official warnings now
- Your property's flood zone: FEMA Flood Map Service Center ↗ — this page cannot tell you that.
- Official preparedness guidance: Ready.gov ↗ and your county emergency management office.
What this page shows, and what it misses
FEMA's National Risk Index rates a whole county against every other US county; it is a planning-level estimate for nationwide comparison, not a flood-zone map and not a substitute for a local risk assessment or the risk to one home. Declarations are presidential disaster, emergency and fire management declarations that named this county; state declarations and SBA or USDA designations are not included. Tornadoes are counted when the county is one of up to four listed on the track; 670 tornadoes that crossed a state line carry no county list in NOAA's file and are left out.
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties - v1.20.0 (December 2025). Retrieved from https://services.arcgis.com/XG15cJAlne2vxtgt/ArcGIS/rest/services/National_Risk_Index_Counties/FeatureServer/0/query on November 2, 2026, 1:20 PM EST. This product uses the Federal Emergency Management Agency’s National Risk Index dataset API or downloadable datasets 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).
Federal Emergency Management Agency (FEMA), OpenFEMA Dataset: Disaster Declarations Summaries - v2, retrieved from https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries on November 2, 2026, 1:21 PM EST. 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).
Tornado records: NOAA/NWS Storm Prediction Center, Severe Weather Database, tornadoes 1950–2025 (https://www.spc.noaa.gov/wcm/data/1950-2025_actual_tornadoes.csv, downloaded 2 November 2026). Public domain; not endorsed by NOAA. Compiled by Global Incident Tracker.
Questions about Alleghany County
What natural disasters is Alleghany County, Virginia most at risk from?
Alleghany County, Virginia has a Very Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 38.1 out of 100, higher than about 38% of US counties, with strong winds, landslides and avalanches scoring highest of its 18 hazards and $11 million a year in expected losses.
How many federal disaster declarations has Alleghany County had?
OpenFEMA lists 18 federal disaster declarations that included Alleghany County since 1969, not counting 2 for COVID-19; the latest is EM-3631-VA (Severe Winter Storm, declared 23 January 2026). Another 3 Virginia declarations were made statewide without a county list.
How many tornadoes have hit Alleghany County?
NOAA's Storm Prediction Center has no tornado on record touching Alleghany County from 1950 to 2025.
Is the National Risk Index a flood zone map?
No. The National Risk Index is a planning-level estimate for a whole county, built for nationwide comparison. It does not tell you the flood zone or the risk of a single property: for that, look up the address on FEMA's Flood Map Service Center (msc.fema.gov) and ask your local floodplain manager.