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Galveston, TX · Galveston County

Water Risk Profile — ZIP 77551

Flood risk, local cost data, climate factors, and insurance context for your ZIP code.

Flood Risk

Very High

Cost Range

$1,725–$9,775

Avg Response

42 min

NFIP

State participates

Local Climate & Risk Factors

Galveston area water damage risk includes Texas's variable climate threats. Dallas-Fort Worth's Blackland Prairie clay soils create the highest slab leak frequency in the country — clay expansion and contraction stress post-tension slab foundations, causing supply line failures. Houston and coastal Texas face hurricane flooding (Harvey deposited 60 inches in Harris County in 2017), bayou system flooding, and combined sewer overflow. Texas homeowners should document any water damage event carefully — insurers in Texas have specific prompt-pay obligations and the state has one of the strongest homeowner enforcement mechanisms through the Texas Insurance Code.

Flood-prone areas: The East End Historic District, with its concentration of elevated Victorian-era homes, is more resilient than many areas but still experienced significant flooding during Hurricane Ike because storm surge overtopped the seawall's eastern terminus where no barrier exists. The UTMB and Hospital District area and the neighborhoods along 61st Street and Broadway — which sit below the seawall's protected corridor — flooded extensively in 2008 and remain at high risk in any storm that approaches Ike's surge levels.

Insurance tip: Texas coastal homeowners must purchase wind coverage through the Texas Windstorm Insurance Association separately from their standard homeowners policy, and TWIA coverage does not include storm surge flood losses — confirm you hold a separate NFIP or private flood policy before hurricane season begins each June.

Water Category Cost Table — Galveston, TX

Extraction & drying cost per square foot by IICRC water category

Water Category$/sq ft
Category 1 — Clean

Burst supply line, clean appliance overflow

$3.15–$7.74
Category 2 — Gray

Dishwasher, washing machine, toilet bowl (no feces)

$7.74–$9.37
Category 3 — Black

Sewage backup, floodwater, toilet overflow with feces

$11–$13.86

Estimates exclude reconstruction (drywall, flooring replacement). National benchmarks: Cat 1 $3.75–$4.25, Cat 2 $4.10–$6.50, Cat 3 $7–$7.50/sq ft — adjusted for Galveston market (3.712.6/sq ft range).

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