Natural hazards · Harrison

Harrison, SD natural hazards

Most of the natural-hazard damage FEMA expects in Harrison comes from inland flooding, and overall the risk is low 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 Harrison?

Low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Harrison to be higher than in 29% of U.S. communities, mostly from inland flooding and cold waves.

Inland flooding47%Cold waves26%Hail10%Tornadoes9%Everything else8%

By hazard

What Harrison faces

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

Inland flooding

47% of expected damage

Below average · higher than 40% of U.S. places

Recorded about 3 times a year in the area

Cold waves

26% of expected damage

Above average · higher than 69% of U.S. places

Recorded about 12 times a year in the area

Hail

10% of expected damage

Well above average · higher than 76% of U.S. places

Recorded about 4 times a year in the area

Tornadoes

9% of expected damage

Well above average · higher than 88% of U.S. places

Recorded about once every 2 years in the area

Lower here

Ice stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesStrong windLightningDrought

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 Harrison flood?

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

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Spink County.

Disasters that hit Harrison

4 federal disasters brought FEMA money here

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

Brought FEMA money into HarrisonDeclared for Spink County only

2011

Flooding

$11K to the Township of Harrison for repairs

2010

Flooding

$3K to the Township of Harrison for repairs

2009

Severe Storms and Flooding

$27K to the Township of Harrison for repairs

2001

Severe Winter Storms, Flooding, and Ice Jams

$5K to the Township of Harrison for repairs

Spink County has had 21 natural disasters declared since 1953, most often floods and severe storms.

Around Harrison

Harrison and the towns around it

Very lowLowModerateHighVery high

Harrisonmostly inland floodingLow

Belle Plainemostly inland floodingLow

Antelopemostly inland floodingLow

Lincolnmostly inland floodingLow

Capitolamostly inland floodingLow

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