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Natural hazards · Grafton

Grafton, IA natural hazards

Most of the natural-hazard damage FEMA expects in Grafton comes from drought, and overall the risk is moderate for a U.S. community. 2 federal disasters brought FEMA money into town.

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

How exposed is Grafton?

44
Moderate
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Grafton to be higher than in 44% of U.S. communities, mostly from drought and inland flooding.

Drought37%Inland flooding27%Tornadoes15%Cold waves12%Strong wind5%Everything else4%
By hazard

What Grafton faces

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

Drought

37% of expected damage
Recorded about 23 times a year in the area

Inland flooding

27% of expected damage
Below average · higher than 47% of U.S. places
Recorded about once a year in the area

Tornadoes

15% of expected damage
Well above average · higher than 98% of U.S. places
Recorded about once every 9 years in the area

Cold waves

12% of expected damage
Well above average · higher than 87% of U.S. places
Recorded about 11 times a year in the area

Strong wind

5% of expected damage
Well above average · higher than 97% of U.S. places
Recorded about 4 times a year in the area

Lower here

HailIce stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesLightning

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 Grafton flood?

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

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

2 federal disasters brought FEMA money here

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

Brought FEMA money into GraftonDeclared for Worth County only
2008

Severe Storms, Tornadoes, and Flooding

10 households applied for aid $21K aid approved $3K to the City of Grafton for repairs
2004

Severe Storms, Tornadoes, and Flooding

6 households applied for aid $9K aid approved
Worth County has had 14 natural disasters declared since 1953, most often severe storms and floods.
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. Grafton 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 Grafton’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Grafton. 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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