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Flood risk and storm water in Marietta

Local figures and plain answers for Marietta, GA, written for people dealing with water damage now.

Flood claims in Marietta's ZIP codes paid an average of $27,692 toward building repairs from 2016 to 2025, against $35,154 across Cobb County.

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  • Water removal, drying and repair

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Technical drawing of flood damage restoration: flooded basement cleanup, storm water cleanup and crawl space water removal.
Flood Damage Restoration covers flooded basement cleanup, storm water cleanup and crawl space water removal.

What happens when you call

  1. Call (833) 728-2327

    Tell the person who answers what got wet and where the water came from. Calls are answered 24/7.

  2. Stop the source

    You get help shutting off the water or the power to a wet room while the crew is on the way.

  3. Inspection and written estimate

    Moisture readings, photos and a written estimate come before any work begins.

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A guide for water damage restoration in Marietta and the towns around it.

53% of homes in Marietta are rented.

Marietta and water from outside

Marietta files flood claims more often than Cobb County. FEMA flood insurance records show 1.7 claims per 1,000 homes from 2016 to 2025, against 1.0 for the county and 1.6 for Georgia, and the average building payment in the city was $27,692. FEMA's National Risk Index puts yearly inland flood loss at 76 per $100,000 of building value, against 72 for the county and 70 for the state, and 1.0% of Cobb homes carry federal flood insurance.

Storms bring the water. NOAA climate normals show about 16 days a year with an inch of rain or more, and Cobb County logged 5 days with flash flood or flood reports from 2016 to 2025, with 4 major disaster declarations for floods and storms since 2000. Heavy rain on hilly, built-up ground runs to creeks and low streets fast, and basements, ground-floor apartments and garages below grade take water first. With 40% of homes in buildings with 5 or more units, a flooded ground floor can affect several households at once.

Outside water is Category 3. It carries soil, runoff and often sewage, so soaked drywall, carpet and insulation are removed, not dried. A homeowners or renters policy does not pay for it, and only flood insurance does. If storm water does come in, the restoration crew handling flood damage restoration in the Marietta area will need to know whether a flood policy exists before it removes anything.

FEMA and NOAA figures for Marietta

The city of Marietta counts about 61,773 residents, by the Census; the figures below are its own.

40% of homes in Marietta sit in larger multi-unit buildings, compared with 16% across Georgia.

About 35% of the homes in Marietta date from before 1980, against 28% across Cobb County.

15% of households in Marietta moved in from 2021 on, compared with 11% across Georgia.

  • 53% Homes that are rentedCobb County: 33% Marietta53%Cobb33%GA35%
  • 40% Homes in buildings with 5 or more unitsCobb County: 22% Marietta40%Cobb22%GA16%
  • 26,868 Housing units
  • 61,773 Residents
  • 35% Homes built before 1980Cobb County: 28% Marietta35%Cobb28%GA32%
  • 76 Yearly inland flood loss per $100,000 of building valueCobb County: 72 Marietta76Cobb72GA70
  • 5% Homes built before 1950Cobb County: 2% Marietta5%Cobb2%GA6%
  • 62 Nights a year at or below 32 degreesCobb County: 65 Marietta62Cobb65GA51
  • 7 Nights a year at or below 20 degreesCobb County: 8 Marietta7Cobb8GA6

Sources: U.S. Census Bureau, American Community Survey 2019-2023 5-year estimates; FEMA OpenFEMA, FIMA NFIP Redacted Claims v3, claims from 2016 to 2025 (not endorsed by FEMA); FEMA OpenFEMA, NFIP Residential Penetration Rates v1 (not endorsed by FEMA); FEMA National Risk Index v1.20, December 2025 (not endorsed by FEMA); NOAA NCEI, U.S. Climate Normals 1991-2020, nearest weather station; FEMA OpenFEMA, Disaster Declarations Summaries v2 (not endorsed by FEMA); NOAA NCEI Storm Events Database, 2016 to 2025.

Getting ready in Marietta

Marietta averages 16 days a year with an inch of rain or more, so its downspouts carry a heavy load. Clean them before the spring storms, extend each downspout so it empties well away from the foundation, and fill low spots so the soil drops away from the walls. A yard that tips toward the house sends runoff straight to the crawl space or basement.

If you have a sump pump, test it with a bucket of water and add battery backup for storm outages. Clear leaves out of basement window wells and fit covers. Move papers, photos and electronics off lower floors. Census figures show 15% of households moved in since 2021, so newer residents should look up their address on the FEMA flood map. FEMA notes a 30-day waiting period before a new flood policy takes effect, so buy one before storm season rather than during it.

With 62 nights a year at or below 32 degrees, insulate pipes in outside walls and crawl spaces too. When water does get in, cut power to wet rooms, photograph the damage and call. Renters, 53% of households here, should tell the landlord at once. Burst pipe cleanup and storm water jobs both start with extraction and moisture readings, and water removal in Mableton follows the same steps.

Getting your paperwork ready in Marietta

Get ready in Marietta before the water does. Check your address on FEMA's flood maps, record a short video of every room, and keep policy numbers and the location of the main shutoff and breaker panel on paper. Store important papers above the basement floor. When water comes in, take photos of the water line before anything is moved; those pictures matter for the cleanup plan and for any claim. Laminate and hardwood under floodwater often need subfloor water damage repair once drying ends.

Flood questions in Marietta

What does a FEMA flood risk rating mean for my Marietta home?

FEMA's National Risk Index rates counties and census tracts for hazards such as riverine and coastal flooding, from very low to very high, using expected losses and community factors. It describes the area, not one house: a low lot or a basement can flood in a lower-rated area. Check your own FEMA flood zone too.

How do I keep storm water out of a Marietta basement?

Most basement water from storms comes from runoff at the foundation. Point downspouts away from the house, keep the yard sloping away, test the sump pump and its backup, and seal cracks and window wells.

Is flood cleanup different from other water damage?

Yes. Outside floodwater is Category 3 under the IICRC S500 standard, so carpet, pad, insulation and drywall below the water line are removed rather than dried, and hard surfaces are disinfected. Sewage and chemicals in floodwater are why the crew wears protective gear.

What should I do after floodwater gets into my Marietta home?

Keep out of the water until the electricity to the area is off. Floodwater counts as contaminated, so wear boots and gloves if you must go in. Photograph the water line, then call for extraction and drying; soaked porous materials below the line are usually removed.

Where can I check the flood zone for a Marietta address?

On the FEMA Flood Map Service Center at msc.fema.gov: type the address to see its flood zone and the map's date. FEMA's National Risk Index adds a county and ZIP view of expected flood losses. A low-risk zone is not a no-risk zone; water from heavy rain still reaches basements outside mapped flood areas.

Other guides for Marietta

Every Marietta water damage guide

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