FEMA NRI v1.20Released December 2025Methodology

Louisiana Disaster Risk

Natural disaster risk data for all 64 counties.

FEMA release

December 2025

Mean county NRI score

62.4

Counties with Data

of 64 total

County risk atlas

Louisiana hazard exposure by county

FEMA NRI v1.20 scores on a 0–100 relative scale. Toggle the composite and five selected hazard categories out of FEMA's 18. Flood is the higher of Coastal Flooding and Inland Flooding NRI scores.

Counties

64/64

Mean county NRI score

62.4

Risk layers

Highest Risk Counties

Jefferson Parish

Relatively High

NRI score 98.7

Orleans Parish

Relatively High

NRI score 98.3

East Baton Rouge Parish

Relatively High

NRI score 98.0

St. Tammany Parish

Relatively High

NRI score 96.6

Calcasieu Parish

Relatively High

NRI score 95.7

Lowest Risk Counties

Caldwell Parish

Very Low

NRI score 10.5

LaSalle Parish

Very Low

NRI score 12.2

Tensas Parish

Very Low

NRI score 14.5

West Carroll Parish

Very Low

NRI score 15.4

Red River Parish

Very Low

NRI score 16.7

All Louisiana Counties

County	NRI score	FEMA Rating	Flood	Wildfire	Tornado	Earthquake
Jefferson Parish	98.7	Relatively High	96.0	27.3	72.2	78.0
Orleans Parish	98.3	Relatively High	93.5	48.1	71.6	80.4
East Baton Rouge Parish	98.0	Relatively High	97.3	32.3	99.6	84.4
St. Tammany Parish	96.6	Relatively High	94.2	89.6	86.6	67.3
Calcasieu Parish	95.7	Relatively High	94.5	90.6	95.6	65.5
Lafayette Parish	95.2	Relatively High	93.0	53.0	65.3	68.4
Livingston Parish	94.5	Relatively High	94.9	56.8	95.7	57.5
Terrebonne Parish	94.2	Relatively Moderate	94.0	23.3	92.9	54.8
Tangipahoa Parish	93.3	Relatively Moderate	91.2	78.3	90.2	65.3
Caddo Parish	92.6	Relatively Moderate	92.0	62.8	89.8	84.7
Ascension Parish	92.1	Relatively Moderate	79.2	26.6	95.3	58.4
Lafourche Parish	91.3	Relatively Moderate	81.8	18.9	94.5	55.4
Iberia Parish	90.6	Relatively Moderate	81.4	29.0	91.6	46.5
St. Mary Parish	88.9	Relatively Moderate	93.0	15.0	86.4	43.7
Acadia Parish	88.6	Relatively Moderate	86.4	61.6	71.5	48.3
St. Landry Parish	88.2	Relatively Moderate	87.4	65.3	94.1	58.9
Ouachita Parish	87.5	Relatively Moderate	87.1	56.2	96.0	89.3
St. Martin Parish	87.3	Relatively Moderate	87.0	25.0	89.5	43.8
Washington Parish	85.5	Relatively Moderate	79.0	80.0	71.6	54.7
St. Charles Parish	85.1	Relatively Moderate	95.4	18.5	77.2	35.0
Vermilion Parish	84.8	Relatively Moderate	79.5	44.1	29.9	34.1
Rapides Parish	84.3	Relatively Moderate	82.2	78.0	68.7	73.7
Bossier Parish	82.5	Relatively Moderate	74.0	38.6	85.8	72.0
St. John the Baptist Parish	81.5	Relatively Moderate	75.4	11.9	79.7	37.3
Evangeline Parish	75.9	Relatively Low	62.3	68.7	87.8	40.3
St. Bernard Parish	75.6	Relatively Low	74.4	38.7	50.9	33.4
Jefferson Davis Parish	74.3	Relatively Low	66.7	67.8	75.7	31.3
Iberville Parish	73.7	Relatively Low	65.6	6.0	77.4	34.7
Avoyelles Parish	73.0	Relatively Low	44.5	49.3	84.3	52.1
Plaquemines Parish	72.9	Relatively Low	83.0	20.5	40.2	29.5
St. James Parish	71.0	Relatively Low	83.4	4.8	67.6	30.2
Assumption Parish	70.3	Relatively Low	78.0	4.0	67.4	30.0
Webster Parish	69.5	Relatively Low	65.0	41.9	78.2	69.6
Vernon Parish	68.9	Relatively Low	66.6	79.8	86.0	40.5
Lincoln Parish	64.3	Relatively Low	54.3	29.7	86.9	68.2
Pointe Coupee Parish	63.1	Relatively Low	26.3	11.8	78.8	39.3
Sabine Parish	61.0	Relatively Low	66.5	67.4	72.0	37.1
East Feliciana Parish	56.4	Relatively Low	54.6	58.6	77.5	38.3
Natchitoches Parish	56.4	Relatively Low	61.3	51.4	64.2	57.1
Beauregard Parish	55.6	Relatively Low	59.9	86.3	48.1	34.1
Morehouse Parish	55.3	Relatively Low	59.4	48.3	68.4	74.5
Allen Parish	50.7	Relatively Low	45.1	76.7	65.1	29.7
Union Parish	49.7	Relatively Low	57.8	44.9	64.6	52.7
De Soto Parish	42.0	Very Low	46.2	55.5	50.0	42.3
Claiborne Parish	41.7	Very Low	35.2	28.6	63.0	48.8
Richland Parish	36.7	Very Low	30.8	24.6	71.8	61.6
St. Helena Parish	36.3	Very Low	35.0	53.3	69.2	28.4
Franklin Parish	35.9	Very Low	30.6	21.2	64.9	54.1
West Feliciana Parish	34.7	Very Low	31.5	37.6	64.9	25.0
Cameron Parish	33.7	Very Low	84.6	86.5	26.7	10.4
Madison Parish	32.4	Very Low	18.0	4.9	71.9	49.8
West Baton Rouge Parish	31.8	Very Low	16.0	2.9	65.6	31.1
Concordia Parish	31.6	Very Low	22.8	11.1	49.1	49.7
Grant Parish	29.6	Very Low	40.1	39.3	60.8	36.6
Winn Parish	29.5	Very Low	40.9	33.1	58.8	41.1
Bienville Parish	28.7	Very Low	25.1	21.4	54.2	42.3
Jackson Parish	26.2	Very Low	27.6	30.5	62.6	48.2
East Carroll Parish	21.6	Very Low	8.7	6.9	62.7	58.5
Catahoula Parish	17.0	Very Low	14.5	17.7	30.4	39.9
Red River Parish	16.7	Very Low	17.9	17.1	45.1	34.4
West Carroll Parish	15.4	Very Low	9.0	23.7	42.1	55.9
Tensas Parish	14.5	Very Low	8.0	6.3	46.0	37.0
LaSalle Parish	12.2	Very Low	23.4	20.0	30.8	35.9
Caldwell Parish	10.5	Very Low	17.6	26.0	39.9	28.3

Frequently Asked Questions

How many Louisiana county records are included?

RiskByCounty includes 64 Louisiana county records from FEMA NRI v1.20 (December 2025).

Which FEMA county ratings appear in Louisiana?

FEMA NRI v1.20 (December 2025) county rating counts for Louisiana: Very Low: 21; Relatively Low: 19; Relatively Moderate: 17; Relatively High: 7; Very High: 0; Not available: 0.

How complete are the five selected hazard fields for Louisiana?

FEMA NRI v1.20 (December 2025) availability among 64 county records: Flood: 64 of 64; Wildfire: 64 of 64; Tornado: 64 of 64; Earthquake: 64 of 64; Hurricane: 64 of 64. RiskByCounty displays five selected hazard categories out of FEMA's 18.

Official Ready.gov resource

Continue to Ready.gov for federal emergency-planning information maintained outside RiskByCounty.

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Data Source

County data sourced from FEMA National Risk Index v1.20, released December 2025. Values are labeled NRI score (0–100 relative scale). RiskByCounty displays five selected hazard categories out of FEMA's 18; flood is the higher of the Coastal Flooding and Inland Flooding source scores.

RiskByCounty presents county-level source fields and deterministic arithmetic summaries.

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