FEMA NRI v1.20Released December 2025Methodology

Pennsylvania Disaster Risk

Natural disaster risk data for all 67 counties.

FEMA release

December 2025

Mean county NRI score

67.4

Counties with Data

of 67 total

County risk atlas

Pennsylvania 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

67/67

Mean county NRI score

67.4

Risk layers

Highest Risk Counties

Philadelphia County

Very High

NRI score 99.6

Allegheny County

Relatively High

NRI score 98.1

Montgomery County

Relatively High

NRI score 96.8

Lancaster County

Relatively High

NRI score 95.0

Bucks County

Relatively High

NRI score 94.8

Lowest Risk Counties

Fulton County

Very Low

NRI score 7.8

Sullivan County

Very Low

NRI score 10.7

Cameron County

Very Low

NRI score 12.6

Montour County

Very Low

NRI score 14.7

Forest County

Very Low

NRI score 19.9

All Pennsylvania Counties

County	NRI score	FEMA Rating	Flood	Wildfire	Tornado	Earthquake
Philadelphia County	99.6	Very High	99.6	28.7	98.7	98.3
Allegheny County	98.1	Relatively High	99.2	60.4	91.2	87.9
Montgomery County	96.8	Relatively High	98.2	37.3	95.6	94.2
Lancaster County	95.0	Relatively High	96.9	37.2	79.8	93.5
Bucks County	94.8	Relatively High	97.1	55.5	92.1	93.9
Lehigh County	93.9	Relatively Moderate	95.4	30.3	87.4	89.8
Delaware County	92.9	Relatively Moderate	94.4	27.7	92.5	94.5
Berks County	92.7	Relatively Moderate	94.8	38.0	90.6	91.3
Chester County	91.9	Relatively Moderate	94.3	30.7	88.0	90.2
Luzerne County	91.6	Relatively Moderate	95.3	53.7	81.6	83.9
Dauphin County	91.1	Relatively Moderate	94.8	38.9	79.8	87.3
York County	90.4	Relatively Moderate	93.3	41.0	47.6	88.0
Northampton County	90.0	Relatively Moderate	93.6	28.6	80.9	84.4
Lackawanna County	89.9	Relatively Moderate	94.1	41.4	68.1	75.0
Westmoreland County	87.8	Relatively Moderate	93.8	54.0	55.7	73.8
Cumberland County	86.2	Relatively Moderate	91.1	47.6	68.2	81.9
Schuylkill County	85.3	Relatively Moderate	90.8	55.6	66.2	71.9
Monroe County	85.1	Relatively Moderate	88.1	51.6	65.9	73.2
Erie County	84.1	Relatively Moderate	90.7	36.9	66.6	60.1
Washington County	83.1	Relatively Moderate	91.4	46.1	49.8	59.3
Fayette County	82.2	Relatively Moderate	90.6	45.2	68.8	60.7
Lebanon County	79.9	Relatively Low	84.9	22.5	70.3	80.9
Lycoming County	79.6	Relatively Low	89.0	26.9	50.4	48.3
Butler County	79.3	Relatively Low	89.0	39.0	59.8	52.1
Northumberland County	79.2	Relatively Low	88.3	31.3	46.9	63.7
Mercer County	77.7	Relatively Low	87.9	36.4	55.3	51.5
Blair County	77.7	Relatively Low	87.5	32.0	58.9	62.3
Cambria County	76.4	Relatively Low	85.7	41.0	63.9	60.6
Franklin County	76.4	Relatively Low	84.3	51.3	46.2	75.4
Crawford County	76.0	Relatively Low	87.2	36.0	52.5	50.3
Beaver County	75.3	Relatively Low	87.0	34.9	56.6	55.0
Bradford County	73.1	Relatively Low	86.1	21.7	31.6	45.1
Armstrong County	69.3	Relatively Low	85.1	22.0	34.2	35.2
Mifflin County	69.3	Relatively Low	83.6	26.6	41.8	48.6
Bedford County	68.2	Relatively Low	84.0	29.2	26.0	44.5
Centre County	68.0	Relatively Low	81.2	32.5	42.8	58.2
Adams County	67.5	Relatively Low	76.2	44.2	46.2	72.6
Clearfield County	67.1	Relatively Low	80.6	34.3	40.7	43.4
Lawrence County	66.1	Relatively Low	83.1	27.3	37.7	36.7
Pike County	65.9	Relatively Low	78.8	71.9	27.8	56.1
Warren County	65.6	Relatively Low	82.8	11.9	21.9	21.1
Somerset County	64.2	Relatively Low	80.0	40.8	35.5	54.2
Indiana County	63.7	Relatively Low	77.8	37.9	42.6	48.3
Columbia County	62.1	Relatively Low	78.6	27.5	36.1	51.6
Tioga County	59.8	Relatively Low	78.9	20.8	24.0	31.1
Carbon County	59.4	Relatively Low	67.5	41.3	37.9	46.6
Jefferson County	57.9	Relatively Low	74.5	16.4	31.2	35.4
Wayne County	56.3	Relatively Low	71.3	20.1	30.4	47.6
Venango County	55.6	Relatively Low	74.1	12.6	34.5	28.5
Union County	55.2	Relatively Low	71.8	10.4	33.7	43.6
Greene County	55.1	Relatively Low	74.3	23.4	34.7	39.0
Snyder County	54.3	Relatively Low	71.2	17.7	36.9	48.7
McKean County	53.8	Relatively Low	73.2	10.2	24.5	36.1
Susquehanna County	53.6	Relatively Low	71.0	21.2	47.0	46.9
Perry County	53.1	Relatively Low	69.5	25.0	31.6	38.7
Clinton County	51.8	Relatively Low	71.3	15.2	27.3	33.0
Huntingdon County	50.3	Relatively Low	68.8	22.9	27.1	41.8
Elk County	45.2	Relatively Low	68.0	5.9	18.1	27.6
Wyoming County	44.8	Relatively Low	69.2	21.9	20.6	35.8
Juniata County	38.8	Very Low	60.3	16.5	26.9	37.8
Clarion County	30.0	Very Low	52.2	16.3	28.8	32.0
Potter County	28.1	Very Low	55.2	3.3	15.0	21.1
Forest County	19.9	Very Low	43.5	4.8	14.0	19.6
Montour County	14.7	Very Low	38.3	4.6	20.3	33.8
Cameron County	12.6	Very Low	40.7	0.7	10.8	12.6
Sullivan County	10.7	Very Low	37.4	6.0	12.2	24.5
Fulton County	7.8	Very Low	21.5	22.8	15.5	34.2

Frequently Asked Questions

How many Pennsylvania county records are included?

RiskByCounty includes 67 Pennsylvania county records from FEMA NRI v1.20 (December 2025).

Which FEMA county ratings appear in Pennsylvania?

FEMA NRI v1.20 (December 2025) county rating counts for Pennsylvania: Very Low: 8; Relatively Low: 38; Relatively Moderate: 16; Relatively High: 4; Very High: 1; Not available: 0.

How complete are the five selected hazard fields for Pennsylvania?

FEMA NRI v1.20 (December 2025) availability among 67 county records: Flood: 67 of 67; Wildfire: 67 of 67; Tornado: 67 of 67; Earthquake: 67 of 67; Hurricane: 67 of 67. 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.

← Back to All States

Explore more data for Pennsylvania

Property Tax Cost of Living Crime Rate Income Health Schools Water Quality Weather County Score