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Natural hazards · Gahanna

Gahanna, OH natural hazards

Most of the natural-hazard damage FEMA expects in Gahanna comes from inland flooding, and overall the risk is moderate for a U.S. community. Flood insurance has paid 28 claims here since 1978. 7 federal disasters brought FEMA money into town.

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

How exposed is Gahanna?

44
Moderate
vs. U.S. communities

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

Inland flooding68%Cold waves11%Tornadoes8%Heat waves7%Everything else6%
By hazard

What Gahanna faces

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

Inland flooding

68% of expected damage
Above average · higher than 69% of U.S. places
Recorded about 4 times a year in the area

Cold waves

11% of expected damage
Below average · higher than 31% of U.S. places
Recorded about 4 times a year in the area

Tornadoes

8% of expected damage
Above average · higher than 64% of U.S. places

Heat waves

7% of expected damage
Below average · higher than 36% of U.S. places
Recorded about 4 times a year in the area

Lower here

HurricanesHailIce stormsWinter weatherWildfireEarthquakesLandslidesStrong windLightningDrought

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 Gahanna flood?

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

28paid claims since 1978
$139Kpaid to owners
3homes flooded more than once
19782026

Homes that flooded again and again

■ FEMA “severe repetitive loss” (0) ■ flooded 2+ times

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

What’s been done with FEMA grants

2storm safe rooms built
Disasters that hit Gahanna

7 federal disasters brought FEMA money here

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

Brought FEMA money into GahannaDeclared for Franklin County only
2012

Severe Storms and Straight-Line Winds

$46K to the City of Gahanna for repairs
2008

Severe Wind Storm Associated With Tropical Depression Ike

$91K to the City of Gahanna for repairs
2008

Record Snow and Near Record Snow

$44K to the City of Gahanna for repairs
2004

Severe Winter Storms, Flooding, and Mudslides

45 households applied for aid $12K aid approved $43K to the City of Gahanna for repairs
2004

Snow

$34K to the City of Gahanna for repairs
2003

Tornadoes, Flooding, Severe Storms, and High Winds

50 households applied for aid $82K aid approved
2003

Severe Winter Storm and Record/Near Record Snow

$21K to the City of Gahanna for repairs
Franklin County has had 17 natural disasters declared since 1953, most often severe storms and winter storms.
Around Gahanna

Gahanna and the towns around it

Mifflin: Moderate, mostly inland floodingJefferson: Low, mostly inland floodingColumbus: Low, mostly inland floodingClinton: Very low, mostly inland floodingReynoldsburg: Low, mostly inland floodingPataskala: Low, mostly inland floodingTruro: Low, mostly inland floodingHamilton: Very low, mostly inland floodingNorwich: Low, mostly inland floodingJackson: Very low, mostly inland floodingMadison: Moderate, mostly inland floodingPlain: Low, mostly inland floodingWashington: Low, mostly inland floodingBlendon: High, mostly inland floodingPrairie: Low, mostly inland floodingHilliard: Low, mostly inland floodingSharon: Very low, mostly inland floodingGahanna: Moderate, mostly inland flooding GahannaMifflinJeffersonColumbus
Very lowLowModerateHighVery high
Gahannamostly inland floodingModerate
Mifflinmostly inland floodingModerate
Columbusmostly inland floodingLow
Jeffersonmostly 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. Gahanna covers 7 census tracts, combined by population.
Money that reached townFlood claims are matched to Gahanna’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Gahanna. FEMA’s model follows property values, so a place that recently lost many homes can rate lower than it feels.

FEMA’s expected losses across Gahanna total about $10.1M a year, counting buildings, people and crops.

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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