Water Damage in Savannah, GA: Tide, Rain and Storm Surge

Savannah takes on water from several directions at once. The Atlantic tide pushes up the Savannah River and into the marsh creeks twice a day, rain collects on ground that is close to level, and now and then a tropical system shoves the sea inland. Add the household causes found everywhere, a split supply line, a failed water heater, an overflowing washing machine, and a house here has four separate ways to end up wet.

This page goes through each of them using figures from the City of Savannah, the Chatham Emergency Management Agency and the National Weather Service. It then covers what an owner faces once the water is out: the City’s flood rebuilding rules, historic district review, mold and the public offices worth knowing. GA Water Damage is a free referral service that connects callers with independent local water damage restoration providers; it is not a contractor and does no restoration work itself. The provider you are connected with handles the assessment, the estimate and the job.

Three ways water gets into a Savannah home

The City of Savannah explains its flooding in one sentence: stormwater run-off is hampered by flat terrain, low elevations and tidal influence from the Atlantic Ocean. Its flood FAQ adds that floods here come with long periods of moderate rain or with short, intense storms, and that the local flood record runs from 1871 to as recently as July 2007. Water that lands on the city has little slope to run down and, at high tide, nowhere lower to go.

The map shows why. Savannah sits about 20 miles up the Savannah River from the Atlantic at roughly 20 feet of elevation. Chatham County covers 632 square miles, and 206 of them, 32.6 percent, are water. The Savannah River forms the county’s northeast edge and the Ogeechee its southwest edge, and the county’s emergency managers also name the Wilmington, Vernon, Forest and Grove rivers.

• Tide: salt water that rises through the river, the marsh and the storm drains, sometimes under a clear sky.
• Rain: a stalled front or an afternoon thunderstorm that outruns the canals and ditches.
• Storm surge: the sea pushed inland ahead of a hurricane or tropical storm.
• Plumbing: supply lines, drains and appliances inside the house, the cause that has nothing to do with weather.

The source matters after the fact. It decides how contaminated the water is treated as being, which insurance policy an owner turns to, and whether the City’s floodplain rules apply to the repair. For how the work itself is organized across the state, see the page on water damage restoration in Georgia.

When the tide and the rain arrive together

The National Weather Service measures Savannah’s tide at the Fort Pulaski gauge near the mouth of the river. Shallow coastal flooding typically begins there at 9.5 feet above mean lower low water. A tide at that level does not need a storm behind it, which is why a low street can hold water on a dry afternoon.

The harder case is tide and rain at once. On August 22 and 23, 2025 the tide at Fort Pulaski peaked at 9.69 and 9.74 feet while a stalled cold front brought heavy rain. Storm totals reported on the morning of August 24 were 2.70 inches at Savannah International Airport and 3.92 inches at a gauge 5.9 miles south-southwest of the city. Neither number is extreme alone; together they left the rain with a full tide in its way.

The City’s defense is a stormwater system of 7 pump stations, 416 miles of pipe, 147 miles of ditches, 31 tide gates and 21,043 catch basins and manholes. A tide gate works as a one-way flap: stormwater can leave, and the gate shuts against water coming the other way. The City has also set up a stormwater utility fee, based on the square footage of hard surface on a parcel less any credits, with the first bills scheduled for mailing starting September 1, 2026.

Canals are part of the drainage picture. Chatham Emergency Management names the Springfield, Casey, Placentia, Pipemakers and Hardin canals, and the City’s flood protection page lists six drainage basins with their own local flood studies: Bilbo, Fell Street, Casey North, Casey South, Placentia and Springfield. The agency also keeps a blunt count. Chatham County has flooded more than 14 times since 1948 in storms of 4 inches of rain or more, with over 1,400 dwellings flooded in those events.

Storm surge on the record

Surge is the weather cause with the highest readings on the gauge. Two readings stand out in the National Weather Service record for the Fort Pulaski gauge, and they came eleven months apart.

Storm	Peak at Fort Pulaski	When	How it ranks
Hurricane Matthew	12.56 feet	3:42 AM, October 8, 2016	The highest level recorded to date, per the NWS
Tropical Storm Irma	12.24 feet	1:42 PM, September 11, 2017	At the time, the second highest on record, per the NWS
Shallow coastal flooding	9.5 feet	Typical starting level	The threshold both storms cleared by more than two and a half feet

Hurricane Debby in August 2024 is on the record here for rain and river flooding. Georgia declared a state of emergency on August 3, Savannah-Chatham County public schools dismissed early on Monday, August 5 and stayed closed the next two days, and the heaviest Georgia rain reported was 9.5 inches in 24 hours at Blitchton in Bryan County, west of Savannah. Effingham County ordered mandatory evacuations for roads along the flooding Ogeechee River.

Chatham County plans for surge by zone. On the county’s evacuation zone page, Zone A is everything east of the Truman Parkway and the Vernon River, Zone B lies west of the parkway but east of Interstate 95, and Zone C is west of Interstate 95.

Water that came from the sea or a river is handled differently from a clean supply-line leak. General summaries of the trade’s water damage standard list seawater and rising water from rivers or streams as typical Category 3 sources, the most contaminated class, though the category assigned to any one loss depends on the conditions found there. What that means for flooring, drywall and contents is explained on the flood damage restoration in Georgia page.

The wettest months and the rare hard freeze

Savannah’s normal precipitation is 48.12 inches a year, spread over about 108 days with measurable rain. June is the wettest normal month at 6.65 inches and November the driest at 2.39. Half of the year’s rain arrives from June through September, mostly in frequent, brief thunderstorms.

The extremes sit in the same part of the calendar. In the National Weather Service record for the Savannah station, which starts in 1871, all ten of the wettest months land between June and October. September 1924 brought 22.88 inches and August 1898 brought 22.79, each close to half a normal year in a single month. The wettest year on record, 1885, reached 73.94 inches.

Cold is the smaller risk, though not a missing one. Savannah averages about 21 days a year with a low below freezing. On December 25, 2022 the station recorded a high of 45 degrees and a low of 21, against an average low for that date of 42. The all-time record low is 3 degrees, set in January 1985. A pipe in an unheated or exposed part of a house can freeze and split at temperatures like those, and the page on burst pipe water damage in Georgia covers the shut-off and what follows.

Old houses, historic districts and exterior repairs

Census estimates for 2024 count 67,733 housing units in the city, with a median year built of 1971. About 37 percent were built before 1960, and 9,211 date from 1939 or earlier. Another 11,648 have gone up since 2010, so the stock is split between very old and quite new.

Age matters for the plumbing cause. Supply lines, drain lines and shut-off valves that have been in service for decades have had that much longer to corrode, clog and seize, and a slow leak inside an old wall can run for a long time before it shows. A provider working in an older house will usually want to know what the walls and floors are made of before deciding what can be dried in place and what has to come out.

The oldest part of town comes with an extra layer of review. The downtown Savannah Historic District has been a National Historic Landmark District since 1966. It covers about 1,300 acres bounded by East Broad Street, Gwinnett Street, Martin Luther King Jr. Boulevard and the river, and holds 22 squares lined with 18th and 19th century buildings. The Metropolitan Planning Commission lists nine local districts inside the city:

• Savannah Downtown Historic District, the landmark district and its squares.
• Victorian Historic District and the Streetcar Historic District, the latter formerly called Mid-City.
• Cuyler-Brownville Historic District, annexed by the City in 1886 and a local historic district since 1999.
• Ardsley Park-Chatham Crescent, a conservation district developed in 1909 and 1910 between Victory Drive, 54th Lane, Bull Street and Waters Avenue.
• The Ardmore, Parkside, Kensington Park-Groveland and Historic Carver Village/Flatman Village conservation districts.

In all of them, a Certificate of Appropriateness applied for through the planning commission’s office is required for a variety of exterior changes that can be seen from the public right-of-way. That applies to contributing and non-contributing buildings alike, and each district has its own regulations, application and checklist. Storm-damaged siding, windows or doors on a street-facing wall can come under that review, so it is worth a call to the commission before exterior materials are ordered.

Outside those districts the city spreads across six principal areas, Downtown, Midtown, Southside, Eastside, Westside and Southwest or West Chatham, with more than 100 neighborhoods between them. The last of those is made up of recently annexed suburbs.

Rebuilding after a flood: the 50 percent rule

Drying a flooded house is one job. Being allowed to rebuild it the way it was is a separate question, and in Savannah the answer can depend on a date and a percentage.

The bar for compliance rose recently. Since January 1, 2025, new and substantially improved structures in the 100-year floodplain must be built with two feet of freeboard above the Base Flood Elevation. The City’s older FAQ still mentions one foot; two feet is the current figure on its flood protection page.

The City states that reconstruction of flooded structures may require a building permit. Permits come from the Development Services Department through its eTRAC online portal, and the department’s Permit and Floodplain Manager is the named contact for flood rebuilding questions. An owner who lives in the house may pull a permit for their own work under conditions that include a notarized affidavit, and must use Georgia-licensed contractors for any part they do not do personally. That option does not extend to rental property.

Savannah has six FEMA flood zones: A, AE, AH, VE, X and X-500. A parcel’s zone and contour elevations can be looked up on SAGIS, the regional mapping site at sagis.org. Being outside the high-risk zones is not the same as being dry, and the City notes that almost 25 percent of flood insurance claims come from areas of low to moderate flood risk.

Humidity, mold and the 48 hour window

Savannah’s average outdoor relative humidity is 71.7 percent. The EPA advises keeping indoor humidity below 60 percent, ideally between 30 and 50 percent, to discourage mold. In a city where the outside air starts that damp, opening the windows is rarely a drying plan.

The EPA’s working figure is that materials dried within 24 to 48 hours of a leak will, in most cases, not grow mold. That window is the reason the first stage of the work, stopping the source, extracting water and setting up drying, is treated as urgent; it is covered on the water mitigation in Georgia page. Some participating providers offer 24/7 emergency service, though availability varies and is never guaranteed.

If growth has already started, the rules are thinner than most owners expect. The Georgia Department of Public Health says there are no enforceable state or federal standards for mold inspection, testing or remediation, and it does not inspect, test or remediate homes. What the process should look like is set out under mold remediation in Georgia.

Savannah offices worth knowing

A restoration provider deals with the inside of the house. Several of the problems around it belong to a public office, and each of these publishes its current contact details on its own site.

Situation	Office	Good to know
Anyone in danger, or water near live electricity	911	Stay out of standing water where power may still be on
Flooded street, blocked drain or another City problem	City of Savannah 311	Staffed Monday to Friday, 8 a.m. to 5 p.m., and for emergencies on Saturday and Sunday; also takes requests online and by app
Water and sewer account, or a high bill after a leak	City of Savannah Utility Services	At the Coastal Georgia Center; open Monday to Friday, 8:15 a.m. to 5 p.m.
Permit to rebuild, flood zone or Base Flood Elevation inside the city	Development Services Department	Home of the Permit and Floodplain Manager and the eTRAC portal
Flood zone questions in unincorporated Chatham County	Chatham County Engineering Department	The county office, not the City’s
Evacuation zones and storm preparation	Chatham Emergency Management Agency	Based on Bull Street downtown
A non-urgent police matter after a storm	Savannah Police Department non-emergency line	Published on the department’s site

Two details from Utility Services are worth keeping. When a leak drives up a water bill, the customer can apply for an adjustment once the repair is completed, and the adjustment follows after the City has received and approved the documentation, so keep the plumber’s invoice. The City also warns that it does not phone customers about service disruptions or to collect payment, a useful thing to remember when scam calls follow a storm.

What published guides say the work costs

No checked source publishes a Savannah-only price range, and GA Water Damage does not set prices. The figures below are HomeAdvisor’s national estimates from its guide updated June 17, 2026. They are not a quote from any provider, and only an estimate made on site can price a specific job.

HomeAdvisor national figure	Amount
Average water damage restoration bill	$3,868
What most homeowners pay	$1,383 to $6,369
Full range reported	$450 to $16,000
Clean water cleanup, per square foot	About $3.50
Gray water cleanup, per square foot	About $5.25
Black water cleanup, per square foot	About $7.50

The per-square-foot gap between clean and black water is the part that bears on Savannah. HomeAdvisor’s black water figure is more than twice its clean water figure for the same floor area. Where tidal or canal water is classed as black water on a given job, that higher figure is the one that applies, and the provider on site decides the category from what is found there.

Before you hire the provider

Providers reached through this site are independent businesses, and checking their license and insurance is the homeowner’s job. Georgia licenses general and residential contractors, plumbers, electricians and conditioned air contractors, and the Attorney General’s consumer site explains how to look one up through the Secretary of State’s licensee search. The state contractor board also advises asking for proof of general liability insurance and checking that the name on it matches the licensed person or business.

Savannah is the one tidal city covered here. For an inland river city, see water damage restoration in Columbus, GA, and for how the referral works and what it does not include, read about GA Water Damage.

Questions people ask