Natural hazards · Mount Vernon

Mount Vernon, SD natural hazards

Most of the natural-hazard damage FEMA expects in Mount Vernon 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 Mount Vernon?

Moderate

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Mount Vernon to be higher than in 49% of U.S. communities, mostly from inland flooding and tornadoes.

Inland flooding39%Tornadoes18%Cold waves13%Drought12%Hail7%Everything else12%

By hazard

What Mount Vernon faces

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

Inland flooding

39% of expected damage

Above average · higher than 52% of U.S. places

Recorded about 3 times a year in the area

Tornadoes

18% of expected damage

Well above average · higher than 97% of U.S. places

Recorded about once every 4 years in the area

Cold waves

13% of expected damage

Above average · higher than 65% of U.S. places

Recorded about 8 times a year in the area

Drought

12% of expected damage

Recorded about 16 times a year in the area

Hail

7% of expected damage

Well above average · higher than 81% of U.S. places

Recorded about 5 times a year in the area

Lower here

Ice stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesStrong windLightning

Not a risk here

Coastal floodingHurricanesAvalanchesTsunamisVolcanic 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 Mount Vernon flood?

FEMA's records show no paid flood insurance claims in Mount Vernon.

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Davison County.

Disasters that hit Mount Vernon

Federal disasters declared here

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

Brought FEMA money into Mount VernonDeclared for Davison County only

Davison County has had 13 natural disasters declared since 1953, most often floods and severe storms.

Around Mount Vernon

Mount Vernon and the towns around it

Very lowLowModerateHighVery high

Mount Vernonmostly inland floodingModerate

Unionmostly inland floodingModerate

Beulahmostly inland floodingModerate

Blendonmostly inland floodingModerate

Hoppermostly cold wavesModerate

Dudleymostly cold wavesModerate

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. Mount Vernon 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 Mount Vernon’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Township of Mount Vernon. 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.