FEMA NRI v1.20Released December 2025Methodology

Connecticut Disaster Risk

Natural disaster risk data for all 9 counties.

FEMA release

December 2025

Mean county NRI score

87.6

Counties with Data

of 9 total

County risk atlas

Connecticut 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

9/9

Mean county NRI score

87.6

Risk layers

Highest Risk Counties

Capitol Planning Region

Relatively High

NRI score 97.4

Western Connecticut Planning Region

Relatively High

NRI score 96.3

South Central Connecticut Planning Region

Relatively High

NRI score 95.1

Naugatuck Valley Planning Region

Relatively Moderate

NRI score 93.2

Greater Bridgeport Planning Region

Relatively Moderate

NRI score 91.8

Lowest Risk Counties

Northeastern Connecticut Planning Region

Relatively Low

NRI score 62.8

Northwest Hills Planning Region

Relatively Low

NRI score 79.6

Lower Connecticut River Valley Planning Region

Relatively Moderate

NRI score 83.8

Southeastern Connecticut Planning Region

Relatively Moderate

NRI score 88.6

Greater Bridgeport Planning Region

Relatively Moderate

NRI score 91.8

All Connecticut Counties

County	NRI score	FEMA Rating	Flood	Wildfire	Tornado	Earthquake
Capitol Planning Region	97.4	Relatively High	99.0	56.9	90.5	93.5
Western Connecticut Planning Region	96.3	Relatively High	98.1	46.2	69.2	92.0
South Central Connecticut Planning Region	95.1	Relatively High	96.9	41.2	78.0	91.5
Naugatuck Valley Planning Region	93.2	Relatively Moderate	96.3	47.7	73.1	86.1
Greater Bridgeport Planning Region	91.8	Relatively Moderate	94.8	23.9	41.7	86.4
Southeastern Connecticut Planning Region	88.6	Relatively Moderate	91.8	39.4	53.1	80.9
Lower Connecticut River Valley Planning Region	83.8	Relatively Moderate	90.3	43.6	43.3	74.8
Northwest Hills Planning Region	79.6	Relatively Low	88.0	39.9	42.9	66.3
Northeastern Connecticut Planning Region	62.8	Relatively Low	75.2	22.9	28.3	61.4

Frequently Asked Questions

How many Connecticut county records are included?

RiskByCounty includes 9 Connecticut county records from FEMA NRI v1.20 (December 2025).

Which FEMA county ratings appear in Connecticut?

FEMA NRI v1.20 (December 2025) county rating counts for Connecticut: Very Low: 0; Relatively Low: 2; Relatively Moderate: 4; Relatively High: 3; Very High: 0; Not available: 0.

How complete are the five selected hazard fields for Connecticut?

FEMA NRI v1.20 (December 2025) availability among 9 county records: Flood: 9 of 9; Wildfire: 9 of 9; Tornado: 9 of 9; Earthquake: 9 of 9; Hurricane: 9 of 9. 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.

Visit Ready.gov →

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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