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Natural hazards · Castlewood

Castlewood, SD natural hazards

Most of the natural-hazard damage FEMA expects in Castlewood comes from inland flooding, and overall the risk is moderate for a U.S. community. 4 federal disasters brought FEMA money into town.

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

How exposed is Castlewood?

58
Moderate
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Castlewood to be higher than in 58% of U.S. communities, mostly from inland flooding and cold waves.

Inland flooding46%Cold waves18%Tornadoes13%Strong wind9%Hail6%Everything else9%
By hazard

What Castlewood faces

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

Inland flooding

46% of expected damage
Above average · higher than 72% of U.S. places
Recorded about 2 times a year in the area

Cold waves

18% of expected damage
Above average · higher than 59% of U.S. places
Recorded about 13 times a year in the area

Tornadoes

13% of expected damage
Well above average · higher than 94% of U.S. places
Recorded about once every 8 years in the area

Strong wind

9% of expected damage
Well above average · higher than 91% of U.S. places
Recorded about 3 times a year in the area

Hail

6% of expected damage
Above average · higher than 73% of U.S. places
Recorded about 4 times a year in the area

Lower here

Ice stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesLightningDrought

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 Castlewood flood?

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

of all homes
are insured
No community discount. Castlewood isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Hamlin County.
Disasters that hit Castlewood

4 federal disasters brought FEMA money here

Disasters the President declared that paid out in Castlewood itself: aid to households, or repair grants to the Township of Castlewood.

Brought FEMA money into CastlewoodDeclared for Hamlin County only
2019

Severe Winter Storm, Snowstorm, and Flooding

$7K to the Township of Castlewood for repairs
2011

Flooding

$4K to the Township of Castlewood for repairs
2010

Flooding

$6K to the Township of Castlewood for repairs
2001

Severe Winter Storms, Flooding, and Ice Jams

$1K to the Township of Castlewood for repairs
Hamlin County has had 20 natural disasters declared since 1953, most often floods and severe storms.
Around Castlewood

Castlewood and the towns around it

Castlewood: Moderate, mostly inland floodingFlorence: Moderate, mostly inland floodingOxford: Moderate, mostly inland floodingSheridan: Moderate, mostly inland floodingHamlin: Moderate, mostly inland floodingHayti: Moderate, mostly inland floodingEstelline: Moderate, mostly inland floodingDempster: Moderate, mostly inland floodingNorden: Moderate, mostly inland floodingBrantford: Moderate, mostly inland floodingPelican: Low, mostly inland floodingWatertown: High, mostly inland floodingKranzburg: Moderate, mostly inland floodingElmira: Moderate, mostly inland floodingHavana: Low, mostly inland floodingCastlewood: Moderate, mostly inland flooding CastlewoodCastlewoodFlorenceOxfordSheridanHamlin
Very lowLowModerateHighVery high
Sheridanmostly inland floodingModerate
Castlewoodmostly inland floodingModerate
Castlewoodmostly inland floodingModerate
Florencemostly inland floodingModerate
Hamlinmostly inland floodingModerate
Oxfordmostly inland floodingModerate
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. Castlewood 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 Castlewood’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Township of Castlewood. 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.

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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/15 · 2025-01-01
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