Natural hazards · Union Mill

Union Mill, VA natural hazards

Most of the natural-hazard damage FEMA expects in Union Mill comes from inland flooding, and overall the risk is moderate for a U.S. community.

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

Expected damage

How exposed is Union Mill?

Moderate

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Union Mill to be higher than in 48% of U.S. communities, mostly from inland flooding.

Inland flooding85%Hurricanes5%Everything else10%

By hazard

What Union Mill faces

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

Inland flooding

85% of expected damage

Above average · higher than 72% of U.S. places

Recorded about 6 times a year in the area

Hurricanes

5% of expected damage

Above average · higher than 70% of U.S. places

Recorded about once every 12 years in the area

Lower here

TornadoesHailIce stormsWinter weatherCold wavesHeat wavesWildfireEarthquakesLandslidesStrong windLightning

Not a risk here

Coastal floodingDroughtAvalanchesTsunamisVolcanic 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 Union Mill flood?

FEMA's records show no paid flood insurance claims in Union Mill.

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Fairfax County.

Disasters that hit Union Mill

Federal disasters declared here

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

Brought FEMA money into Union MillDeclared for Fairfax County only

Fairfax County has had 17 natural disasters declared since 1953, most often winter storms and hurricanes.

Around Union Mill

Union Mill and the towns around it

Very lowLowModerateHighVery high

Union Millmostly inland floodingModerate

Cliftonmostly inland floodingModerate

Centrevillemostly inland floodingModerate

Braddockmostly inland floodingLow

Fair Lakesmostly inland floodingLow

Fairfax Stationmostly inland floodingLow

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. Union Mill is smaller than a census tract, so it shares the figures of the tract around its center.

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

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.