Louisiana inland flooding risk
East Baton Rouge Parish has the highest inland flooding risk in Louisiana, scoring 97.3 out of 100 — rated "Relatively High" by FEMA's National Risk Index. NOAA has recorded 1,497 inland flooding events across Louisiana over the past decade.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | East Baton Rouge Parish | 97.3 | Relatively High | 87 |
| 2 | Jefferson Parish | 96 | Relatively High | 58 |
| 3 | Livingston Parish | 94.9 | Relatively High | 21 |
| 4 | Calcasieu Parish | 94.5 | Relatively High | 56 |
| 5 | St. Tammany Parish | 94.2 | Relatively High | 96 |
| 6 | Orleans Parish | 93.5 | Relatively High | 170 |
| 7 | Lafayette Parish | 93 | Relatively Moderate | 27 |
| 8 | Caddo Parish | 92 | Relatively Moderate | 139 |
| 9 | Tangipahoa Parish | 91.2 | Relatively Moderate | 19 |
| 10 | St. Landry Parish | 87.4 | Relatively Moderate | 17 |
| 11 | Ouachita Parish | 87.1 | Relatively Moderate | 51 |
| 12 | Acadia Parish | 86.4 | Relatively Moderate | 15 |
| 13 | Rapides Parish | 82.2 | Relatively Moderate | 23 |
| 14 | Terrebonne Parish | 81.9 | Relatively Moderate | 9 |
| 15 | Iberia Parish | 81.4 | Relatively Moderate | 17 |
| 16 | Vermilion Parish | 79.5 | Relatively Moderate | 14 |
| 17 | Washington Parish | 79 | Relatively Moderate | 13 |
| 18 | Ascension Parish | 77.8 | Relatively Moderate | 18 |
| 19 | Bossier Parish | 74 | Relatively Moderate | 60 |
| 20 | St. Martin Parish | 69.5 | Relatively Low | 14 |
| 21 | Jefferson Davis Parish | 66.7 | Relatively Low | 15 |
| 22 | Vernon Parish | 66.6 | Relatively Low | 11 |
| 23 | Sabine Parish | 66.5 | Relatively Low | 32 |
| 24 | Webster Parish | 65 | Relatively Low | 20 |
| 25 | Lafourche Parish | 64.6 | Relatively Low | 6 |
| 26 | Evangeline Parish | 62.3 | Relatively Low | 16 |
| 27 | Natchitoches Parish | 61.3 | Relatively Low | 46 |
| 28 | Beauregard Parish | 59.9 | Relatively Low | 15 |
| 29 | Morehouse Parish | 59.4 | Relatively Low | 17 |
| 30 | Union Parish | 57.8 | Relatively Low | 17 |
| 31 | St. John the Baptist Parish | 57.4 | Relatively Low | 4 |
| 32 | East Feliciana Parish | 54.6 | Relatively Low | 13 |
| 33 | Lincoln Parish | 54.3 | Relatively Low | 9 |
| 34 | St. Charles Parish | 54 | Relatively Low | 39 |
| 35 | St. Mary Parish | 50.1 | Relatively Low | 8 |
| 36 | De Soto Parish | 46.2 | Relatively Low | 32 |
| 37 | Allen Parish | 45.1 | Relatively Low | 13 |
| 38 | Avoyelles Parish | 44.5 | Relatively Low | 9 |
| 39 | Winn Parish | 40.9 | Relatively Low | 18 |
| 40 | Grant Parish | 40.1 | Relatively Low | 27 |
| 41 | Iberville Parish | 36.5 | Relatively Low | 5 |
| 42 | Claiborne Parish | 35.2 | Relatively Low | 5 |
| 43 | St. Helena Parish | 35 | Relatively Low | 2 |
| 44 | St. Bernard Parish | 32.2 | Very Low | 10 |
| 45 | West Feliciana Parish | 31.5 | Very Low | 3 |
| 46 | Richland Parish | 30.8 | Very Low | 18 |
| 47 | Franklin Parish | 30.6 | Very Low | 16 |
| 48 | Assumption Parish | 29.6 | Very Low | 2 |
| 49 | Jackson Parish | 27.6 | Very Low | 7 |
| 50 | Plaquemines Parish | 26.4 | Very Low | 0 |
| 51 | Pointe Coupee Parish | 26.3 | Very Low | 7 |
| 52 | St. James Parish | 25.5 | Very Low | 6 |
| 53 | Bienville Parish | 25.1 | Very Low | 18 |
| 54 | LaSalle Parish | 23.4 | Very Low | 21 |
| 55 | Concordia Parish | 22.8 | Very Low | 7 |
| 56 | Madison Parish | 18 | Very Low | 5 |
| 57 | Red River Parish | 17.9 | Very Low | 22 |
| 58 | Caldwell Parish | 17.6 | Very Low | 11 |
| 59 | Catahoula Parish | 14.5 | Very Low | 9 |
| 60 | West Baton Rouge Parish | 13 | Very Low | 7 |
| 61 | West Carroll Parish | 9 | Very Low | 16 |
| 62 | East Carroll Parish | 8.7 | Very Low | 15 |
| 63 | Tensas Parish | 8 | Very Low | 2 |
| 64 | Cameron Parish | 5.9 | Very Low | 7 |
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.
Inland Flooding risk nationally:
Other hazard risks in Louisiana:
Frequently asked questions
What is the highest inland flooding risk county in Louisiana?
East Baton Rouge Parish, LA has the highest inland flooding risk in Louisiana, with a FEMA National Risk Index score of 97.3 out of 100 (rated "Relatively High").
What causes inland flooding risk in Louisiana?
Inland flooding covers riverine and surface (pluvial) flooding — the most common and costly natural disaster type in the US. High scores appear across river floodplains in the Midwest, South, and Mid-Atlantic, where legacy development in flood-prone areas and aging stormwater infrastructure concentrate risk.