Natural hazards · One Loudoun

One Loudoun, VA natural hazards

Most of the natural-hazard damage FEMA expects in One Loudoun comes from inland flooding, and overall the risk is very low for a U.S. community.

FEMA National Risk Index, December 2025 · OpenFEMA claims, aid & declarations

Expected damage

How exposed is One Loudoun?

Very low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in One Loudoun to be higher than in 2% of U.S. communities, mostly from inland flooding.

Inland flooding49%Heat waves12%Tornadoes11%Earthquakes7%Strong wind6%Hurricanes6%Everything else9%

By hazard

What One Loudoun faces

Each hazard’s share of the damage FEMA expects here, and how that compares with the rest of the country.

Inland flooding

49% of expected damage

Well below average · higher than 4% of U.S. places

Recorded about 3 times a year in the area

Heat waves

12% of expected damage

Below average · higher than 43% of U.S. places

Recorded about 5 times a year in the area

Tornadoes

11% of expected damage

Above average · higher than 50% of U.S. places

Earthquakes

7% of expected damage

Above average · higher than 57% of U.S. places

Strong wind

6% of expected damage

Above average · higher than 53% of U.S. places

Recorded about 8 times a year in the area

Hurricanes

6% of expected damage

Above average · higher than 66% of U.S. places

Recorded about once every 10 years in the area

Lower here

HailIce stormsWinter weatherCold wavesWildfireLandslidesLightningDrought

Not a risk here

Coastal floodingAvalanchesTsunamisVolcanic activity

Flood risk changes street by street. Check a specific address on FEMA’s flood map, and ask about flood insurance before you buy.

Flood insurance claims

Does One Loudoun flood?

FEMA's records show no paid flood insurance claims in One Loudoun.

of homes in flood zones
are insured

of all homes
are insured

No community discount. One Loudoun isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.

Insurance rates: Loudoun County.

Disasters that hit One Loudoun

Federal disasters declared here

None of the disasters declared for Loudoun County shows FEMA aid or repair money reaching One Loudoun itself in FEMA’s records.

Brought FEMA money into One LoudounDeclared for Loudoun County only

Loudoun County has had 13 natural disasters declared since 1953, most often winter storms and hurricanes.

Around One Loudoun

One Loudoun and the towns around it

Very lowLowModerateHighVery high

Ashburnmostly inland floodingVery low

One Loudounmostly inland floodingVery low

About these numbers

How to read this page

An average, not a forecastFEMA’s National Risk Index estimates the damage 18 kinds of natural hazards cause in a typical year, from decades of records and models. A quiet decade can follow a bad year.

Compared by rate“Higher than N%” compares yearly damage as a share of what’s here, so a big city isn’t rated riskier just for having more buildings. One Loudoun covers 1 census tract, combined by population.

Money that reached townFlood claims are matched to One Loudoun’s own flood-insurance community; household aid to the registrant’s city; repair grants to One Loudoun. FEMA’s model follows property values, so a place that recently lost many homes can rate lower than it feels.

FEMA’s expected losses across One Loudoun total about $360K a year, counting buildings, people and crops.

Sources: FEMA National Risk Index (December 2025); OpenFEMA: NFIP redacted claims, multiple-loss properties, community status book and residential penetration rates, housing assistance (owners and renters), public assistance funded projects, hazard mitigation properties and disaster declarations. Census tracts: U.S. Census Bureau.