Alleghany County, Virginia
Natural disaster risk, federal disaster history and flood insurance facts.
Alleghany County, Virginia has a very low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is lower than 62% of US counties. It ranks 52nd of 133 counties in Virginia. The costliest hazards here are inland flooding, strong wind and cold waves. FEMA estimates about $11 million a year in expected losses, or roughly $709 per resident. Since 1969 it has been included in 18 federal disaster or emergency declarations for natural events (12 major disasters). The most recent was in January 2026 (severe winter storm). About 1 in 67 homes here carry federal flood insurance (115 policies). Since 1978, federal flood insurance has paid about $2.9 million on 213 claims here, including $885,000 for floods in 1985.
FEMA National Risk Index December 2025; OpenFEMA declarations to Nov 6, 2026; NFIP records. Updated November 6, 2026.
Top risks in Alleghany County
- Check the FEMA flood map for your address, and ask the seller or landlord about past flooding.
- Price a flood policy now. Most new federal policies take 30 days to start.
- Secure outdoor furniture and trash bins before storms.
- Have trees near the house checked.
- Insulate pipes in outside walls, crawl spaces and garages.
- Know how to shut off the main water valve.
All 18 hazards
What the ratings mean ›| Hazard | Rating | Score | Expected loss a year | |
|---|---|---|---|---|
| Inland flooding | 56.3 | $7M | ||
| Strong wind | 88.5 | $2M | ||
| Cold wave | 55.8 | $1M | ||
| Lightning | 62.8 | $336K | ||
| Hurricane | 54.9 | $110K | ||
| Earthquake | 34.2 | $95K | ||
| Tornado | 9.4 | $52K | ||
| Hail | 16.0 | $50K | ||
| Winter weather | 35.0 | $33K | ||
| Landslide | 83.6 | $23K | ||
| Drought | 26.6 | $14K | ||
| Ice storm | 15.1 | $9K | ||
| Wildfire | 18.1 | $6K | ||
| Avalanche | 67.8 | $3K | ||
| Heat wave | 3.7 | $3K |
Scores are percentiles: a score of 90 means higher risk than about 90% of US counties for that hazard. Hazards FEMA does not rate here are left out. Social vulnerability is relatively moderate and community resilience is relatively moderate in FEMA's measures.
Federal disaster history
Recent disasters nationwide ›Declarations by decade
Federal declarations for natural events that included Alleghany County. 2020s bar runs to November 2026.
By type
Most recent
Show all 18
Virginia also had 6 statewide declarations that did not name single counties.
Storm history since 1960
Tornado risk by county ›The National Weather Service has logged 183 storm reports in Alleghany County since 1960, with 1 death and 5 injuries and about $11.6 million in reported damage. No tornadoes are on record here.
Most damaging storms
| Date | Type | Near | Damage |
|---|---|---|---|
| Jun 23, 2016 | Flash Flood | Jerrys Run | $6M |
| Jan 19, 1996 | Flash Flood | Countywide | $4M |
| Sep 30, 2010 | Flood | Clifton Forge City | $500K |
| Jun 29, 2012 | Thunderstorm Wind | Falling Spg | $500K |
| May 28, 2010 | Flash Flood | Sweet Chalybeate | $250K |
| Jan 25, 2010 | Flash Flood | Iron Gate | $200K |
Source: NOAA Storm Events Database, county-based reports through Jun 22, 2026. Tornado records start in 1950, hail and wind in 1955, and floods and other storm types in 1996, so older decades undercount. Damage is in dollars of the year it happened and is often an estimate. Winter storms, heat and hurricanes are logged by forecast zone, not county, so they are not counted here.
Hurricanes and tropical storms
Hurricane risk by county ›Since 1878, 0 hurricanes and 6 tropical storms have passed within 65 miles of the center of Alleghany County, 2 of them since 1950. The strongest was an unnamed storm in 1893, with top winds near 70 mph about 61 miles away.
Strongest storms nearby
| Date | Storm | Strength | Closest |
|---|---|---|---|
| Aug 29, 1893 | Unnamed | Tropical storm, 70 mph | 61 mi |
| Aug 29, 1949 | Unnamed | Tropical storm, 60 mph | 47 mi |
| Sep 13, 1878 | Unnamed | Tropical storm, 60 mph | 62 mi |
| Sep 1, 1952 | Able | Tropical storm, 50 mph | 55 mi |
| Sep 5, 1979 | David | Tropical storm, 45 mph | 62 mi |
| Aug 3, 1915 | Unnamed | Tropical storm, 45 mph | 61 mi |
Most recent storms
| Date | Storm | Strength | Closest |
|---|---|---|---|
| Sep 5, 1979 | David | Tropical storm, 45 mph | 62 mi |
| Sep 1, 1952 | Able | Tropical storm, 50 mph | 55 mi |
| Aug 29, 1949 | Unnamed | Tropical storm, 60 mph | 47 mi |
| Aug 3, 1915 | Unnamed | Tropical storm, 45 mph | 61 mi |
| Aug 29, 1893 | Unnamed | Tropical storm, 70 mph | 61 mi |
| Sep 13, 1878 | Unnamed | Tropical storm, 60 mph | 62 mi |
Source: NOAA National Hurricane Center best-track records (HURDAT2), 1851 to 2025 for the Atlantic and 1949 to 2025 for the eastern Pacific. A storm counts if its track passed within 65 miles of the county's center while it was a tropical storm or hurricane. Strength is the storm's top sustained wind at that point, not the wind measured in the county. Older storms over the open sea were sometimes missed.
Flood insurance in Alleghany County
Check your address flood zone ›National Flood Insurance Program (NFIP) records only; private flood policies are not included. Home counts as of Aug 3, 2026. Since 2021 NFIP prices each home separately under Risk Rating 2.0, so your price depends on the building, not the county. Ask an agent for a quote.
Homes in Alleghany County
Older homes and mobile homes usually suffer more damage in storms, floods and earthquakes, and can cost more to insure. If you are buying, ask about roof age, foundation bolting and any retrofits. Source: US Census Bureau, American Community Survey 2020 to 2024 5-year estimates; 7,913 housing units.
Compare in Virginia
All 133 ›| Largest counties | Overall risk | Top hazard |
|---|---|---|
| Fairfax County | Inland flooding | |
| Prince William County | Inland flooding | |
| Virginia Beach City | Hurricane | |
| Loudoun County | Inland flooding | |
| Chesterfield County | Inland flooding | |
| Henrico County | Inland flooding | |
| Chesapeake City | Inland flooding | |
| Arlington County | Inland flooding |
Neighboring counties
| County | Overall risk | Declarations |
|---|---|---|
| Botetourt County | 22 | |
| Greenbrier County, WV | 25 | |
| Rockbridge County | 21 | |
| Monroe County, WV | 17 | |
| Covington City | 13 | |
| Craig County | 24 | |
| Bath County | 20 |
Common questions about Alleghany County
What is the biggest natural hazard in Alleghany County?
Inland flooding has the highest expected yearly losses in Alleghany County, about $7.3 million a year in FEMA's estimate. Strong wind is second at $1.7 million.
How many federal disasters has Alleghany County had?
Alleghany County has been included in 18 federal disaster or emergency declarations for natural events since 1969, including 12 major disasters. The most recent was Severe Winter Storm in January 2026.
Is Alleghany County a high-risk place to live?
Its overall rating is Very Low, 52nd highest of 133 in Virginia. A county rating covers the whole area. Risk at one address can be much higher or lower, so check the FEMA flood map and ask about the home's history.
Do I need flood insurance in Alleghany County?
Standard home insurance does not cover flooding. About 1 in 67 homes in Alleghany County has federal flood insurance. Lenders require it in mapped high-risk zones, but many flood claims come from outside those zones.
How many tornadoes has Alleghany County had?
NOAA records list 0 tornadoes in Alleghany County since 1950. The weather service has also logged 39 hail reports and 36 floods here.
How many hurricanes have hit Alleghany County?
NOAA's hurricane records show 0 hurricanes and 6 tropical storms passing within 65 miles of the center of Alleghany County. The strongest was an unnamed storm in 1893, with winds near 70 mph.
Sources: FEMA National Risk Index (December 2025), OpenFEMA Disaster Declarations Summaries, and NFIP policy and claims data. Hazard Compass is independent and not affiliated with FEMA. These figures describe the whole county, not a single property, and are not insurance or safety advice. Report a problem.