FEMA NRI v1.20Released December 2025Methodology

Maryland Disaster Risk

Natural disaster risk data for all 24 counties.

FEMA release

December 2025

Mean county NRI score

60.2

Counties with Data

of 24 total

County risk atlas

Maryland 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

24/24

Mean county NRI score

60.2

Risk layers

Highest Risk Counties

Baltimore city

Relatively High

NRI score 95.0

Baltimore County

Relatively Moderate

NRI score 94.0

Prince George's County

Relatively Moderate

NRI score 93.2

Montgomery County

Relatively Moderate

NRI score 91.7

Anne Arundel County

Relatively Moderate

NRI score 81.9

Lowest Risk Counties

Garrett County

Very Low

NRI score 16.0

Kent County

Very Low

NRI score 27.5

Calvert County

Very Low

NRI score 28.9

Queen Anne's County

Very Low

NRI score 35.6

Talbot County

Very Low

NRI score 42.4

All Maryland Counties

County	NRI score	FEMA Rating	Flood	Wildfire	Tornado	Earthquake
Baltimore city	95.0	Relatively High	94.3	24.0	95.4	93.0
Baltimore County	94.0	Relatively Moderate	93.9	39.5	80.4	92.4
Prince George's County	93.2	Relatively Moderate	94.6	42.3	95.1	93.2
Montgomery County	91.7	Relatively Moderate	93.7	25.1	78.7	91.8
Anne Arundel County	81.9	Relatively Moderate	80.9	35.9	82.0	83.2
Frederick County	74.2	Relatively Low	81.6	27.6	67.2	74.6
Harford County	72.5	Relatively Low	78.4	19.0	35.7	76.1
Howard County	72.4	Relatively Low	78.1	15.6	42.2	77.5
Washington County	68.8	Relatively Low	73.1	38.2	62.0	76.5
Worcester County	68.2	Relatively Low	88.0	65.9	16.1	49.7
Wicomico County	60.8	Relatively Low	57.8	80.9	33.7	60.4
Somerset County	59.6	Relatively Low	93.2	85.8	16.9	38.3
Carroll County	59.5	Relatively Low	66.7	14.0	36.4	67.6
Cecil County	58.6	Relatively Low	60.8	25.3	48.6	70.7
Allegany County	58.5	Relatively Low	73.6	21.0	35.8	52.9
Dorchester County	53.8	Relatively Low	91.2	83.2	31.0	53.4
Caroline County	45.7	Relatively Low	53.4	63.7	24.1	52.8
Charles County	44.1	Relatively Low	52.4	19.2	29.2	68.3
St. Mary's County	42.6	Very Low	63.0	59.0	39.4	57.2
Talbot County	42.4	Very Low	70.6	71.2	31.6	58.5
Queen Anne's County	35.6	Very Low	67.2	59.6	33.2	54.3
Calvert County	28.9	Very Low	59.4	52.6	17.3	50.1
Kent County	27.5	Very Low	60.0	25.4	23.5	52.0
Garrett County	16.0	Very Low	34.7	31.9	21.2	32.4

Frequently Asked Questions

How many Maryland county records are included?

RiskByCounty includes 24 Maryland county records from FEMA NRI v1.20 (December 2025).

Which FEMA county ratings appear in Maryland?

FEMA NRI v1.20 (December 2025) county rating counts for Maryland: Very Low: 6; Relatively Low: 13; Relatively Moderate: 4; Relatively High: 1; Very High: 0; Not available: 0.

How complete are the five selected hazard fields for Maryland?

FEMA NRI v1.20 (December 2025) availability among 24 county records: Flood: 24 of 24; Wildfire: 24 of 24; Tornado: 24 of 24; Earthquake: 24 of 24; Hurricane: 24 of 24. 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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