Natural hazards · St. Onge

St. Onge, SD natural hazards

Most of the natural-hazard damage FEMA expects in St. Onge comes from inland flooding, and overall the risk is high for a U.S. community. 1 federal disaster brought FEMA money into town.

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

Expected damage

How exposed is St. Onge?

High

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in St. Onge to be higher than in 70% of U.S. communities, mostly from inland flooding and wildfires.

Inland flooding40%Wildfire26%Cold waves9%Hail8%Tornadoes5%Strong wind5%Everything else7%

By hazard

What St. Onge faces

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

Inland flooding

40% of expected damage

Above average · higher than 59% of U.S. places

Recorded about once a year in the area

Wildfire

26% of expected damage

Well above average · higher than 98% of U.S. places

Cold waves

9% of expected damage

Above average · higher than 60% of U.S. places

Recorded about 5 times a year in the area

Hail

8% of expected damage

Well above average · higher than 93% of U.S. places

Recorded about 6 times a year in the area

Tornadoes

5% of expected damage

Above average · higher than 56% of U.S. places

Recorded about once every 29 years in the area

Strong wind

5% of expected damage

Well above average · higher than 93% of U.S. places

Recorded about 3 times a year in the area

Lower here

Ice stormsWinter weatherHeat wavesEarthquakesLandslidesLightningDroughtAvalanches

Not a risk here

Coastal floodingHurricanesTsunamisVolcanic 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 St. Onge flood?

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

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Lawrence County.

Disasters that hit St. Onge

1 federal disaster brought FEMA money here

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

Brought FEMA money into St. OngeDeclared for Lawrence County only

2008

Severe Storms and Flooding

$999 to the Township of St. Onge for repairs

Lawrence County has had 15 natural disasters declared since 1953, most often floods and severe storms.

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