Tidal flooding and your tires in Savannah

Let us start with what this page is not going to tell you, because the internet is full of it and we could not stand any of it up.

We are not going to tell you that the salt air is eating your wheels, your valve stems or your TPMS sensors. We went looking for a source and there is not one. Every document we could find that connects salt to a tire or a wheel is about road salt: American Honda's ServiceNews article B15090E, filed with NHTSA, attributes valve-stem oxidation and a resulting slow leak to road salt, and Hyundai's underbody corrosion campaign, TSB 22-01-092H, applies only to vehicles "currently or ever registered in a Salt Belt State" and prints a list of 23 jurisdictions that does not include Georgia. Nobody we could read connects marine air, sea spray or tidal saltwater to wheel or sensor corrosion. So we are not writing it, not even hedged.

What we can do is tell you what the water in this city actually is, what it actually does to a car's contact with the road, and what we will and will not touch afterwards. All of that is sourced, and it is enough.

The water, measured at the gauge

NOAA operates tide station 8670870 at Fort Pulaski, at the mouth of the Savannah River. Its published annual counts of minor high-tide flooding days, averaged by decade from the full series:

Decade	Mean minor flood days per year
1940s	0.3
1950s	0.0
1960s	0.3
1970s	0.6
1980s	0.8
1990s	1.6
2000s	1.7
2010s	5.5
2015–2024	10.6

Every one of the ten years in the 1950s recorded zero. The most recent decade averages roughly eleven. The highest single-year count in the whole published series is 20, recorded for 2023, followed by 15 for 2019 and 14 for 2025.

One honest limit on that last sentence. NOAA publishes high-tide flooding on a May-to-April meteorological year in some products and on a calendar year in others, and we did not establish which basis this particular series uses. The decadal comparison above is unaffected, because the basis is consistent across the series; a single-year statement is more exposed, so lean on the decades.

The trend underneath it is NOAA's own, computed over 15 July 1935 to 15 December 2025: 1.44 inches per decade, with a stated error of 0.05 inches per decade. That is a measured trend over ninety years. We are not converting it into a projection, because NOAA did not.

For completeness, the thresholds behind those day counts, from NOAA's station metadata: minor 12.94 feet, moderate 13.85 feet, major 15.14 feet on the NOS datum, with the National Weather Service using 13.00, 13.50 and 14.00 feet.

Why it happens, in the City's own words

The City of Savannah answers this directly on its Flood Protection Information FAQ, under "What causes flooding in Savannah?". Verbatim:

Stormwater run-off in Savannah is hampered by the flat terrain, low elevations and tidal influence from the Atlantic Ocean. These are major natural factors, common to coastal regions, which cause the City to be at risk for flooding during long periods of moderate rainfall followed or during high volume, short duration rainfall events.

Flat terrain, low elevations, tidal influence. That is the mechanism from the people who manage it, and it is also why rain and tide are not separate problems here: the rainfall has to go somewhere, and where it goes is decided by what the tide is doing. The 1991-2020 normals at Savannah/Hilton Head International give 47.96 inches of rain a year across 108.2 days with measurable rain, and 14.0 days a year delivering an inch or more.

The City has been raising its defences against exactly that. On its flood programme page: "On October 24, 2024, the City of Savannah adopted a two feet freeboard above the Base Flood Elevation (BFE) for new and substantially improved structures within the 100 year floodplain … The new regulation will take effect on January 1, 2025." The previous standard, in place since September 2008, was one foot. SAGIS separately publishes seven City stormwater pump stations and a tide-gate inventory, describing a tide gate as "an opening through which water may flow freely when the tide sets in one direction, but which closes automatically and prevents the water from flowing in the other direction".

How much of the county FEMA has mapped as hazard

SAGIS publishes the FEMA flood-zone layer for Chatham County, downloaded by SAGIS on 17 August 2018. Grouping that layer's own area statistics by zone gives a total mapped area of 14,399,929,146 square feet — 516.5 square miles at 27,878,400 square feet to the square mile — split as Zone AE 200.3 square miles, Zone VE 135.8, Zone A 3.7 and Zone X 176.7.

So 65.8 percent of the area FEMA mapped in Chatham County in that 2018 layer sits in a Special Flood Hazard Area, and 26.3 percent of it is in the coastal high-hazard VE zone, the one that carries wave action.

Read the denominator carefully, because it is easy to overstate and we are not going to. That is a share of the polygon area in a published 2018 mapping layer, which includes tidal water and marsh. It is not a share of Chatham County's land area and it is not a share of its housing. "Two thirds of Savannah is in a flood zone" would be a different and unsupported claim. And we cannot break it down by neighbourhood or by ZIP at all — that needs a geometric intersection we have not run, so nobody should tell you what share of your street floods, including us.

We are also not going to name a street, a route or a causeway that floods on a given tide. The Fort Pulaski gauge measures the river mouth, not your block, and we sourced no road-closure record for this metro.

What standing water actually does to a tire

Here is the part that is about your car rather than about the coast.

Water between the tread and the road is the thing tread exists to move. That is the entire function of those grooves, and it is why Georgia measures them. O.C.G.A. 40-8-74(e)(1) requires "not less than 2/32 inch tread measurable in all major grooves", and adds that "such measurements shall not be made where tie bars, humps, or fillets are located" — measure the groove, not the raised strip in it, and measure every major groove rather than the deepest one. A tire that is legal in the middle and under the line on an inner edge is exactly the tire that surprises somebody on a wet road.

Standing water hides what is under it. Kerbs, debris, an open drain, a dropped edge. An impact against something submerged is an impact like any other, and the faults it produces are the second and third limbs of that same statute: cuts, breaks or snags "deep enough to expose body cord", and "bumps, bulges, or separations". A sidewall bulge after driving through water is a separation in the casing, it is not repairable, and it is unlawful to operate on regardless of how much tread is left. A bulge in a sidewall and a bubble in the tread both cover what you are looking for.

And depth is not the only reason not to drive into it. Whatever a tire does, the rest of the car has limits that are not ours to advise on. This page is about tires; how deep is too deep for your particular vehicle is a question for its manufacturer and for whoever is managing the road.

What to check after the water has gone down

1. Walk all four tires with a torch. Sidewalls first, both inner and outer faces where you can see them. Any bump, bulge or separation is a replacement, not a repair.
2. Look for cuts and snags deep enough to show cord. Any depth of tread, anywhere on tread or sidewall.
3. Measure every major groove, away from the tie bars, with a gauge rather than an eye. 2/32 of an inch is about two credit cards thick.
4. Check the pressures cold against the door placard, not the sidewall number. What the tire pressure placard means.
5. Watch for a leak appearing over the following weeks. A damaged bead seat or a knocked wheel shows up as a slow loss rather than a bang. Slow leak tire repair in Savannah is what that turns into.

What we will and will not do afterwards

We will come to the car, take the wheel off, take the tire off the rim and inspect the liner, which is the only place impact damage reliably shows. We will tell you what we find before anything is charged for a repair.

What we will not do is fit a new tire to a wheel that is not fit for it. The published industry line, which we work to, is Tire Rack's: "New tires cannot safely be mounted on dented or rusted wheels. If your wheels are dented or rusted over, we will not be able to install your tires", and "Rusted or swollen lug nuts that cannot be removed will prevent installation." That is a genuine reason a visit can end without a fitting, and it is better said now than at your kerb.

One more sourced point worth having, since corrosion is what everyone asks about. The manufacturers who run underbody corrosion campaigns scope them to the salt belt, and Georgia is not in it. So a Savannah car does not get the OEM corrosion programme a Michigan car gets — which is a fact about what is not offered here, not evidence that the coast is doing anything to your wheels.

Our price: $145, and $50 for each extra tire

A mobile puncture repair is $145 for the first tire and $50 for each additional tire in the same visit. That is the price, not an estimate and not a starting figure. It covers getting to you, the wheel off, the tire demounted and inspected from the inside, a plug and patch fitted the way the tire industry requires, remounting, rebalancing, a TPMS reset where the vehicle supports it, and the wheel back on. There is no separate call-out fee. If the damage turns out not to be repairable — and impact damage from standing water frequently is not — we tell you on the spot: the inspection is charged and the repair is not.

For a replacement we supply and fit at the same address on the same visit. We do not mount tires bought elsewhere, and we do not sell used tires, which is worth more than usual after a flooding event: a part-worn tire arrives with somebody else's impact history and no way to read it. Repair or replace, find your tire size, replace two or four and what mobile tire replacement costs cover the rest.

Where to go next

Mobile tire repair in Savannah covers the visit, flat tire repair in Savannah covers the tire that is already down, a nail in your tire covers punctures, and what tire repair costs in Savannah covers the money. Thunderstorms and tire work in Savannah covers the rain that arrives fast rather than the tide that arrives slowly, a 30-day inspection notice covers what happens if an officer finds the damage first, and our Savannah service area covers where we come.

Questions people ask

• Does Savannah's salt air corrode my wheels or TPMS sensors? We could not source that and we will not write it. The documented salt mechanism is road salt — Honda attributes valve-stem oxidation and slow leaks to it — and Hyundai's corrosion campaign covers a 23-jurisdiction salt belt that excludes Georgia.
• How often does tidal flooding happen here? At the Fort Pulaski gauge, minor high-tide flooding averaged 0.0 days a year across the 1950s and 10.6 a year over 2015-2024, on NOAA's own counts. The highest single year in the published series is 20 days, recorded for 2023.
• Is sea level actually rising at Savannah? NOAA's published trend for that station, computed over 1935 to 2025, is 1.44 inches per decade with a stated error of 0.05. That is the measurement; we are not turning it into a forecast.
• Which streets flood? We are not going to name one. The gauge data is river-mouth data, not street data, and we found no road-closure record for this metro to work from.
• How much of Chatham County is in a flood zone? In the 2018 FEMA layer SAGIS publishes, 65.8 percent of the mapped area is in a Special Flood Hazard Area and 26.3 percent is in the coastal high-hazard VE zone. That is polygon area including water and marsh, not land area and not housing.
• My car went through water. What should I look for? Bulges, separations, cuts deep enough to show cord, and a slow loss of pressure appearing over the following weeks. Impact damage from a submerged kerb is often invisible until the tire comes off the rim.
• Will you fit tires to a wheel that has been under water? Only if the wheel is sound. We do not mount new tires on dented or rusted wheels, and lug nuts that cannot be removed stop the job.