Texas coastal flooding risk
Galveston County has the highest coastal flooding risk in Texas, scoring 88.6 out of 100 — rated "Relatively High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Galveston County | 88.6 | Relatively High |
| 2 | Harris County | 83.2 | Relatively High |
| 3 | Orange County | 80.2 | Relatively Moderate |
| 4 | Jefferson County | 78.8 | Relatively Moderate |
| 5 | Brazoria County | 76.4 | Relatively Moderate |
| 6 | Nueces County | 72.2 | Relatively Moderate |
| 7 | Matagorda County | 68 | Relatively Moderate |
| 8 | Aransas County | 67.8 | Relatively Moderate |
| 9 | Cameron County | 67 | Relatively Moderate |
| 10 | Chambers County | 55 | Relatively Low |
| 11 | Calhoun County | 53.8 | Relatively Low |
| 12 | San Patricio County | 53 | Relatively Low |
| 13 | Jackson County | 51.8 | Relatively Low |
| 14 | Refugio County | 42.6 | Very Low |
| 15 | Willacy County | 40.4 | Very Low |
| 16 | Newton County | 38.2 | Very Low |
| 17 | Kleberg County | 34.8 | Very Low |
| 18 | Hardin County | 34.4 | Very Low |
| 19 | Victoria County | 27.8 | Very Low |
| 20 | Liberty County | 20.6 | Very Low |
| 21 | Fort Bend County | 19.2 | Very Low |
| 22 | Jasper County | 0 | No Rating |
| 23 | Kenedy County | 0 | No Rating |
| 24 | Wharton County | 0 | No Rating |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Coastal Flooding risk nationally:
Other hazard risks in Texas:
Frequently asked questions
What is the highest coastal flooding risk county in Texas?
Galveston County, TX has the highest coastal flooding risk in Texas, with a FEMA National Risk Index score of 88.6 out of 100 (rated "Relatively High").
What causes coastal flooding risk in Texas?
Coastal flooding scores cover storm surge, wave action, and tidal flooding along the Gulf, Atlantic, and Pacific coasts, and Great Lakes shoreline. Inland flooding is scored separately. Counties with "Not Applicable" ratings have no significant coastal exposure. Coastal flood events are reported at zone level in NOAA Storm Events and are not included in county-level counts.