Natural hazards · Hanahan

Hanahan, SC natural hazards

Most of the natural-hazard damage FEMA expects in Hanahan comes from hurricanes, and overall the risk is very high for a U.S. community. Flood insurance has paid 187 claims here since 1979. 13 federal disasters brought FEMA money into town.

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

Expected damage

How exposed is Hanahan?

Very high

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Hanahan to be higher than in 96% of U.S. communities, mostly from hurricanes and earthquakes.

Hurricanes54%Earthquakes26%Inland flooding13%Everything else7%

By hazard

What Hanahan faces

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

Hurricanes

54% of expected damage

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

Recorded about once every 3 years in the area

Earthquakes

26% of expected damage

Well above average · higher than 89% of U.S. places

Inland flooding

13% of expected damage

Below average · higher than 47% of U.S. places

Recorded about 2 times a year in the area

Lower here

Coastal floodingTornadoesHailIce stormsWinter weatherCold wavesHeat wavesWildfireLandslidesStrong windLightning

Not a risk here

DroughtAvalanchesTsunamisVolcanic 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 Hanahan flood?

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

187paid claims since 1979

$3.5Mpaid to owners

38homes flooded more than once

19792026

Biggest named events

Hurricane Matthew: 61 claims, $2.3M
October severe storms: 30 claims, $321K
Hurricane Irma: 17 claims, $381K

Homes that flooded again and again

■ FEMA “severe repetitive loss” (5) ■ flooded 2+ times

of homes in flood zones
are insured

of all homes
are insured

🏷️ 20% off flood insurance. Hanahan is in FEMA’s Community Rating System (class 6) for its flood-proofing work.

Insurance rates: Berkeley County.

What’s been done with FEMA grants

2homes raised above flood level

Disasters that hit Hanahan

13 federal disasters brought FEMA money here

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

Brought FEMA money into HanahanDeclared for Berkeley County only

2024

Hurricane Helene

3 households applied for aid

2024

Tropical Storm Debby

$123K to the City of Hanahan for repairs

2023

Hurricane Idalia

$32K to the City of Hanahan for repairs

2022

Hurricane Ian

$114K to the City of Hanahan for repairs

2020

Severe Storms, Tornadoes, and Straight-Line Winds

6 households applied for aid $5K aid approved

2019

Hurricane Dorian

$183K to the City of Hanahan for repairs

2018

Hurricane Florence

$89K to the City of Hanahan for repairs

2017

Hurricane Irma

$48K to the City of Hanahan for repairs

2016

Hurricane Matthew

105 households applied for aid $66K aid approved $180K to the City of Hanahan for repairs

2015

Severe Storms and Flooding

241 households applied for aid $182K aid approved $19K to the City of Hanahan for repairs

2004

Tropical Storm Frances

5 households applied for aid $7K aid approved

2004

Tropical Storm Gaston

$22K to the City of Hanahan for repairs

1999

Hurricane Floyd Major Disaster Declarations

$23K to the City of Hanahan for repairs

Berkeley County has had 18 natural disasters declared since 1953, most often hurricanes and severe storms.

Around Hanahan

Hanahan and the towns around it

Very lowLowModerateHighVery high

Hanahanmostly hurricanesVery high

North Charlestonmostly hurricanesVery high

Charlestonmostly hurricanesVery high

Goose Creekmostly hurricanesVery high

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. Hanahan covers 5 census tracts, combined by population.

Money that reached townFlood claims are matched to Hanahan’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Hanahan. 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 Hanahan total about $20.7M 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.