Natural hazards · Marietta

Marietta, GA natural hazards

Most of the natural-hazard damage FEMA expects in Marietta comes from inland flooding, and overall the risk is low for a U.S. community. Flood insurance has paid 75 claims here since 1979. 5 federal disasters brought FEMA money into town.

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

Expected damage

How exposed is Marietta?

Low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Marietta to be higher than in 27% of U.S. communities, mostly from inland flooding and tornadoes.

Inland flooding54%Tornadoes19%Cold waves9%Earthquakes9%Everything else9%

By hazard

What Marietta faces

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

Inland flooding

54% of expected damage

Below average · higher than 39% of U.S. places

Recorded about once a year in the area

Tornadoes

19% of expected damage

Well above average · higher than 80% of U.S. places

Cold waves

9% of expected damage

Well above average · higher than 83% of U.S. places

Recorded about once a year in the area

Earthquakes

9% of expected damage

Above average · higher than 67% of U.S. places

Lower here

HurricanesHailIce stormsWinter weatherHeat wavesWildfireLandslidesStrong windLightning

Not a risk here

Coastal floodingDroughtAvalanchesTsunamisVolcanic 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 Marietta flood?

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

75paid claims since 1979

$3.0Mpaid to owners

5homes flooded more than once

19792026

Biggest named events

Late summer storms: 15 claims, $818K
Hurricane Dennis: 6 claims, $245K
Tropical Storm Ivan: 2 claims, $17K

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

🏷️ 15% off flood insurance. Marietta is in FEMA’s Community Rating System (class 7) for its flood-proofing work.

Insurance rates: Cobb County.

What’s been done with FEMA grants

70flood-prone properties bought out and cleared

Disasters that hit Marietta

5 federal disasters brought FEMA money here

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

Brought FEMA money into MariettaDeclared for Cobb County only

2017

Hurricane Irma

$10K to the City of Marietta for repairs

2009

Severe Storms and Flooding

1,774 households applied for aid $1.6M aid approved $48K to the City of Marietta for repairs

2005

Hurricane Katrina Evacuation

$29K to the City of Marietta for repairs

2004

Hurricane Ivan

84 households applied for aid $78K aid approved $38K to the City of Marietta for repairs

2000

Severe Winter Storm

$471K to the City of Marietta for repairs

Cobb County has had 16 natural disasters declared since 1953, most often hurricanes and severe storms.

Around Marietta

Marietta and the towns around it

Very lowLowModerateHighVery high

Mariettamostly inland floodingLow

Smyrnamostly inland floodingLow

Fair Oaksmostly inland floodingVery low

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. Marietta covers 15 census tracts, combined by population.

Money that reached townFlood claims are matched to Marietta’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Marietta. 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 Marietta total about $17.5M 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.