FEMA NRI v1.20Released December 2025Methodology

Mississippi Disaster Risk

Natural disaster risk data for all 82 counties.

FEMA release

December 2025

Mean county NRI score

50.9

Counties with Data

of 82 total

County risk atlas

Mississippi 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

82/82

Mean county NRI score

50.9

Risk layers

Highest Risk Counties

Harrison County

Relatively High

NRI score 95.6

Hinds County

Relatively Moderate

NRI score 94.3

Jackson County

Relatively Moderate

NRI score 92.3

DeSoto County

Relatively Moderate

NRI score 89.0

Lauderdale County

Relatively Moderate

NRI score 87.0

Lowest Risk Counties

Issaquena County

Very Low

NRI score 8.0

Montgomery County

Very Low

NRI score 10.9

Jefferson County

Very Low

NRI score 11.3

Choctaw County

Very Low

NRI score 11.5

Webster County

Very Low

NRI score 12.6

All Mississippi Counties

County	NRI score	FEMA Rating	Flood	Wildfire	Tornado	Earthquake
Harrison County	95.6	Relatively High	91.6	94.5	96.0	70.5
Hinds County	94.3	Relatively Moderate	95.1	54.6	98.2	90.9
Jackson County	92.3	Relatively Moderate	86.8	94.1	90.0	57.9
DeSoto County	89.0	Relatively Moderate	80.1	67.9	96.8	96.2
Lauderdale County	87.0	Relatively Moderate	80.1	57.7	94.4	81.7
Warren County	86.3	Relatively Moderate	72.8	39.4	91.7	74.3
Pearl River County	86.1	Relatively Moderate	73.2	90.1	82.8	46.4
Rankin County	85.0	Relatively Moderate	79.6	55.2	94.7	81.4
Washington County	83.0	Relatively Moderate	81.2	26.1	93.0	90.8
Hancock County	82.7	Relatively Moderate	86.2	90.4	76.6	44.7
Madison County	82.1	Relatively Moderate	76.8	53.9	95.8	74.5
Lee County	81.3	Relatively Moderate	72.0	36.6	86.8	93.4
Lowndes County	80.9	Relatively Low	78.1	36.9	91.0	88.6
Jones County	80.2	Relatively Low	71.5	73.9	93.2	77.7
Forrest County	78.1	Relatively Low	69.6	81.7	92.7	68.5
Bolivar County	76.8	Relatively Low	76.9	17.9	82.9	92.2
Leflore County	73.5	Relatively Low	70.0	22.5	88.7	88.0
Marshall County	71.2	Relatively Low	59.3	79.2	89.0	93.0
Yazoo County	71.2	Relatively Low	48.5	44.5	89.2	62.8
Pike County	70.4	Relatively Low	64.8	71.5	90.1	52.5
Sunflower County	69.6	Relatively Low	55.0	19.3	81.1	85.0
Panola County	69.2	Relatively Low	43.9	63.4	87.8	90.9
Monroe County	68.5	Relatively Low	52.4	35.8	86.4	86.7
Alcorn County	65.0	Relatively Low	51.6	44.3	87.5	89.8
Lamar County	65.0	Relatively Low	62.1	81.6	73.8	54.3
Lafayette County	64.4	Relatively Low	47.8	48.1	81.1	88.5
Oktibbeha County	62.8	Relatively Low	53.2	37.7	83.3	85.1
Coahoma County	62.5	Relatively Low	46.3	10.5	86.6	90.7
Copiah County	61.3	Relatively Low	46.7	49.6	89.5	56.7
Marion County	60.0	Relatively Low	48.1	75.8	73.4	49.9
Neshoba County	58.3	Relatively Low	41.4	42.0	86.0	74.0
George County	58.0	Relatively Low	31.2	75.6	49.6	28.6
Adams County	57.3	Relatively Low	59.0	41.1	82.1	47.2
Scott County	55.9	Relatively Low	42.0	43.0	78.4	67.5
Leake County	55.7	Relatively Low	45.3	51.9	77.9	63.2
Wayne County	55.7	Relatively Low	43.0	56.9	71.2	53.9
Grenada County	55.4	Relatively Low	58.7	49.1	74.8	82.5
Newton County	52.4	Relatively Low	36.6	38.7	83.5	57.6
Stone County	52.0	Relatively Low	26.7	84.3	54.7	34.6
Prentiss County	51.5	Relatively Low	40.6	44.6	72.9	87.6
Simpson County	51.0	Relatively Low	51.6	48.1	76.7	44.0
Covington County	50.8	Relatively Low	42.2	55.6	62.5	45.0
Pontotoc County	50.1	Relatively Low	35.8	45.4	77.2	85.3
Holmes County	49.8	Relatively Low	32.3	57.5	82.5	69.7
Itawamba County	49.6	Relatively Low	28.2	28.3	66.4	77.0
Lincoln County	48.4	Relatively Low	42.5	62.2	78.5	58.6
Amite County	48.2	Relatively Low	46.3	61.2	67.1	34.0
Smith County	47.2	Relatively Low	40.8	47.3	71.2	49.0
Chickasaw County	43.9	Relatively Low	26.5	30.9	72.6	81.5
Tippah County	43.8	Relatively Low	26.0	51.0	78.6	86.6
Union County	43.5	Relatively Low	38.1	47.3	47.4	85.1
Clay County	42.5	Very Low	33.8	26.3	75.1	79.5
Greene County	42.2	Very Low	38.3	73.3	56.9	31.0
Tate County	41.2	Very Low	26.5	58.9	74.9	86.9
Tallahatchie County	40.1	Very Low	30.3	42.0	65.8	80.3
Winston County	39.9	Very Low	22.2	35.5	79.2	68.5
Jasper County	38.9	Very Low	26.9	46.5	72.3	52.2
Tishomingo County	37.1	Very Low	30.8	37.2	64.4	81.3
Tunica County	36.3	Very Low	23.9	7.5	59.5	89.0
Clarke County	36.0	Very Low	36.7	31.2	66.0	48.4
Attala County	34.2	Very Low	27.9	47.5	73.0	70.0
Wilkinson County	33.5	Very Low	33.8	37.5	49.0	28.3
Noxubee County	29.0	Very Low	23.0	19.3	62.9	68.2
Humphreys County	27.9	Very Low	22.5	12.4	50.8	63.9
Calhoun County	27.7	Very Low	25.3	26.4	49.4	76.8
Walthall County	25.5	Very Low	26.3	66.7	36.1	34.4
Lawrence County	25.0	Very Low	28.3	54.1	56.3	41.3
Claiborne County	24.7	Very Low	25.8	29.2	66.6	39.0
Carroll County	23.3	Very Low	20.4	47.1	47.3	61.7
Jefferson Davis County	23.1	Very Low	23.8	56.7	53.9	38.2
Yalobusha County	19.5	Very Low	19.1	39.2	49.2	71.7
Perry County	19.5	Very Low	23.6	70.6	44.3	33.2
Quitman County	18.5	Very Low	15.8	28.1	56.9	75.8
Franklin County	17.3	Very Low	23.2	40.7	57.4	27.4
Sharkey County	15.8	Very Low	12.2	2.0	45.3	45.0
Benton County	15.2	Very Low	14.2	50.4	54.9	78.4
Kemper County	14.9	Very Low	9.4	25.6	56.4	49.2
Webster County	12.6	Very Low	13.4	23.7	48.4	63.4
Choctaw County	11.5	Very Low	10.0	23.0	48.6	50.1
Jefferson County	11.3	Very Low	16.9	27.6	36.0	29.0
Montgomery County	10.9	Very Low	14.6	27.8	44.8	57.4
Issaquena County	8.0	Very Low	10.2	4.7	29.4	37.2

Frequently Asked Questions

How many Mississippi county records are included?

RiskByCounty includes 82 Mississippi county records from FEMA NRI v1.20 (December 2025).

Which FEMA county ratings appear in Mississippi?

FEMA NRI v1.20 (December 2025) county rating counts for Mississippi: Very Low: 31; Relatively Low: 39; Relatively Moderate: 11; Relatively High: 1; Very High: 0; Not available: 0.

How complete are the five selected hazard fields for Mississippi?

FEMA NRI v1.20 (December 2025) availability among 82 county records: Flood: 82 of 82; Wildfire: 82 of 82; Tornado: 82 of 82; Earthquake: 82 of 82; Hurricane: 82 of 82. 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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