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Natural hazards · Marengo

Marengo, IA natural hazards

Most of the natural-hazard damage FEMA expects in Marengo comes from inland flooding, and overall the risk is moderate for a U.S. community. Flood insurance has paid 9 claims here since 1978. 9 federal disasters brought FEMA money into town.

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

How exposed is Marengo?

47
Moderate
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Marengo to be higher than in 47% of U.S. communities, mostly from inland flooding and tornadoes.

Inland flooding40%Tornadoes17%Strong wind14%Drought13%Hail6%Everything else11%
By hazard

What Marengo 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
Below average · higher than 46% of U.S. places
Recorded about 2 times a year in the area

Tornadoes

17% of expected damage
Well above average · higher than 97% of U.S. places
Recorded about once every 8 years in the area

Strong wind

14% of expected damage
Well above average · higher than 98% of U.S. places
Recorded about 6 times a year in the area

Drought

13% of expected damage
Recorded about 16 times a year in the area

Hail

6% of expected damage
Well above average · higher than 88% of U.S. places
Recorded about 5 times a year in the area

Lower here

HurricanesIce stormsWinter weatherCold wavesHeat wavesWildfireEarthquakesLandslidesLightning

Not a risk here

Coastal floodingAvalanchesTsunamisVolcanic 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 Marengo flood?

Every paid claim on a federal flood insurance policy in Marengo, from FEMA’s records.

9paid claims since 1978
$35Kpaid to owners
0homes flooded more than once
19782026

Biggest named events

  • Midwest Flooding: 1 claim, $5K
of homes in flood zones
are insured
of all homes
are insured
No community discount. Marengo isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Iowa County.
Disasters that hit Marengo

9 federal disasters brought FEMA money here

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

Brought FEMA money into MarengoDeclared for Iowa County only
2020

Severe Storms

$85K to the City of Marengo for repairs
2019

Severe Storms and Flooding

$22K to the City of Marengo for repairs
2014

Severe Storms, Tornadoes, Straight-Line Winds, and Flooding

$16K to the City of Marengo for repairs
2013

Severe Storms, Tornadoes, and Flooding

$4K to the City of Marengo for repairs
2013

Severe Storms, Straight-Line Winds, and Flooding

$3K to the City of Marengo for repairs
2010

Severe Storms, Flooding, and Tornadoes

$4K to the City of Marengo for repairs
2008

Severe Storms, Tornadoes, and Flooding

49 households applied for aid $177K aid approved $47K to the City of Marengo for repairs
2007

Severe Winter Storms

$41K to the City of Marengo for repairs
2004

Severe Storms, Tornadoes, and Flooding

1 household applied for aid
Iowa County has had 20 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. Marengo 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 Marengo’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Marengo. 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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