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Natural hazards · Iroquois

Iroquois, SD natural hazards

Most of the natural-hazard damage FEMA expects in Iroquois comes from cold waves, and overall the risk is low for a U.S. community. 6 federal disasters brought FEMA money into town.

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

How exposed is Iroquois?

30
Low
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Iroquois to be higher than in 30% of U.S. communities, mostly from cold waves and inland flooding.

Cold waves28%Inland flooding28%Tornadoes13%Hail11%Drought7%Everything else13%
By hazard

What Iroquois faces

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

Cold waves

28% of expected damage
Above average · higher than 68% of U.S. places
Recorded about 11 times a year in the area

Inland flooding

28% of expected damage
Below average · higher than 27% of U.S. places
Recorded about once every 2 years in the area

Tornadoes

13% of expected damage
Well above average · higher than 95% of U.S. places
Recorded about once every 4 years in the area

Hail

11% of expected damage
Well above average · higher than 82% of U.S. places
Recorded about 5 times a year in the area

Drought

7% of expected damage
Recorded about 6 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 Iroquois flood?

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

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

6 federal disasters brought FEMA money here

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

Brought FEMA money into IroquoisDeclared for Kingsbury County only
2019

Severe Winter Storm, Snowstorm, and Flooding

$34K to the City of Iroquois for repairs
2013

Severe Storms, Tornadoes, and Flooding

$10K to the City of Iroquois for repairs
2010

Flooding

$3K to the City of Iroquois for repairs
2007

Severe Storms, Tornadoes, and Flooding

4 households applied for aid $2K aid approved $4K to the City of Iroquois for repairs
2005

Severe Winter Storm

$1K to the City of Iroquois for repairs
2001

Severe Winter Storms, Flooding, and Ice Jams

$5K to the City of Iroquois for repairs
Kingsbury County has had 22 natural disasters declared since 1953, most often floods and severe storms.
Around Iroquois

Iroquois and the towns around it

Iroquois: Low, mostly cold wavesLogan: Moderate, mostly inland floodingBanner: Moderate, mostly inland floodingManchester: Low, mostly cold wavesEsmond: Low, mostly cold wavesLe Sueur: Low, mostly cold wavesRichland: Moderate, mostly inland floodingBelle Prairie: Moderate, mostly inland floodingCavour: Moderate, mostly inland floodingFoster: Moderate, mostly inland floodingIroquois: Low, mostly cold waves IroquoisIroquoisLoganBanner
Very lowLowModerateHighVery high
Loganmostly inland floodingModerate
Bannermostly inland floodingModerate
Iroquoismostly cold wavesLow
Iroquoismostly cold wavesLow
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. Iroquois 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 Iroquois’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Iroquois. 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/18 · 2025-01-01
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