FEMA NRI 1.19.0Updated Nov 2023 · Coverage 2014–2023Methodology

Wisconsin Disaster Risk

Natural disaster risk data for all 72 counties.

Avg FEMA Rating

Relatively Low

Avg Percentile

59th

Counties with Data

of 72 total

County risk atlas

Wisconsin hazard exposure by county

A compact 2.5D surface of FEMA National Risk Index percentiles. Toggle composite, flood, wildfire, hurricane, tornado, and earthquake risk to see which counties carry the highest relative exposure without loading the full national explorer dataset.

Counties

72/72

Avg composite

59th

Risk layers

Highest Risk Counties

Milwaukee County

Relatively High

98th percentile

Dane County

Relatively Moderate

94th percentile

Brown County

Relatively Moderate

90th percentile

Waukesha County

Relatively Moderate

89th percentile

Marathon County

Relatively Moderate

87th percentile

Lowest Risk Counties

Pepin County

Very Low

7th percentile

Menominee County

Very Low

9th percentile

Iron County

Very Low

11th percentile

Buffalo County

Very Low

15th percentile

Kewaunee County

Very Low

17th percentile

All Wisconsin Counties

County	Percentile	FEMA Rating	Flood	Wildfire	Tornado	Earthquake
Milwaukee County	98th	Relatively High	97.0	29.5	99.0	80.8
Dane County	94th	Relatively Moderate	94.3	60.2	97.6	70.7
Brown County	90th	Relatively Moderate	91.9	33.8	93.4	35.3
Waukesha County	89th	Relatively Moderate	89.8	49.7	95.7	57.4
Marathon County	87th	Relatively Moderate	87.7	40.1	83.8	18.0
Winnebago County	87th	Relatively Moderate	89.3	40.2	91.3	33.0
Rock County	86th	Relatively Moderate	87.6	26.8	94.3	59.3
Racine County	85th	Relatively Moderate	85.7	29.8	93.1	61.4
Kenosha County	85th	Relatively Moderate	76.6	29.1	92.7	61.5
Columbia County	81th	Relatively Moderate	75.6	42.3	75.7	28.7
La Crosse County	81th	Relatively Low	74.0	11.8	84.6	22.8
Marinette County	80th	Relatively Low	72.7	46.7	49.0	11.9
Outagamie County	80th	Relatively Low	77.1	26.7	86.8	29.4
Monroe County	79th	Relatively Low	78.4	33.3	76.3	17.6
Eau Claire County	78th	Relatively Low	79.9	30.1	80.6	9.8
Fond du Lac County	76th	Relatively Low	74.3	50.7	88.5	35.0
Wood County	76th	Relatively Low	77.7	48.2	79.0	21.4
Jefferson County	76th	Relatively Low	79.5	39.9	86.1	43.4
Vernon County	75th	Relatively Low	70.2	17.2	69.4	13.2
Walworth County	75th	Relatively Low	73.2	25.3	88.2	52.1
Sawyer County	74th	Relatively Low	62.1	17.7	30.2	0.8
Sauk County	72th	Relatively Low	77.5	27.2	78.3	25.3
Adams County	71th	Relatively Low	72.5	53.1	73.4	21.2
Juneau County	71th	Relatively Low	70.7	46.5	65.3	20.3
Sheboygan County	70th	Relatively Low	71.8	27.1	84.4	30.7
Dodge County	70th	Relatively Low	68.0	47.6	85.3	36.9
Manitowoc County	69th	Relatively Low	69.7	19.2	77.3	25.3
Barron County	69th	Relatively Low	59.1	17.6	75.0	7.4
Clark County	68th	Relatively Low	69.1	19.8	71.7	14.1
Washington County	68th	Relatively Low	66.1	49.0	84.1	32.5
Waupaca County	68th	Relatively Low	66.3	40.9	76.8	19.3
Chippewa County	67th	Relatively Low	71.0	20.0	70.9	10.3
St. Croix County	64th	Relatively Low	64.1	45.3	84.8	7.1
Polk County	63th	Relatively Low	55.2	41.7	76.5	5.5
Vilas County	63th	Relatively Low	60.9	22.1	29.1	2.7
Shawano County	63th	Relatively Low	59.7	21.9	65.9	13.1
Portage County	63th	Relatively Low	66.8	32.3	70.2	17.0
Oneida County	63th	Relatively Low	61.1	27.2	46.7	5.2
Douglas County	62th	Relatively Low	61.5	39.2	27.4	2.5
Oconto County	61th	Relatively Low	68.8	38.8	60.3	13.0
Grant County	61th	Relatively Low	62.2	16.7	76.4	29.8
Trempealeau County	59th	Relatively Low	67.5	13.2	59.8	5.5
Green Lake County	58th	Relatively Low	62.3	47.1	75.1	24.0
Florence County	54th	Relatively Low	11.0	8.6	11.0	0.5
Lincoln County	53th	Relatively Low	56.2	29.6	44.0	4.3
Richland County	52th	Relatively Low	62.9	14.8	51.0	12.1
Ozaukee County	50th	Relatively Low	58.3	19.5	59.3	26.4
Langlade County	50th	Relatively Low	39.2	20.6	45.6	8.5
Burnett County	49th	Relatively Low	55.5	68.8	46.7	3.2
Dunn County	49th	Relatively Low	50.2	11.9	68.3	4.6
Jackson County	48th	Relatively Low	54.7	31.0	51.6	6.4
Marquette County	48th	Relatively Low	43.5	36.7	52.9	13.4
Forest County	47th	Relatively Low	20.7	13.4	22.0	1.6
Door County	47th	Relatively Low	52.1	39.9	47.6	12.8
Green County	46th	Relatively Low	44.4	31.1	65.6	29.0
Crawford County	46th	Relatively Low	56.1	13.9	58.4	19.9
Waushara County	43th	Relatively Low	44.9	51.3	60.2	13.1
Pierce County	42th	Very Low	48.7	17.8	73.4	3.3
Rusk County	37th	Very Low	44.7	6.6	34.4	2.5
Taylor County	37th	Very Low	42.5	14.4	48.6	4.1
Bayfield County	35th	Very Low	33.5	17.5	16.0	0.0
Lafayette County	33th	Very Low	27.3	14.7	44.6	21.0
Washburn County	33th	Very Low	32.5	39.5	35.5	1.0
Price County	32th	Very Low	38.7	13.7	34.3	2.4
Ashland County	32th	Very Low	28.2	5.4	13.8	0.3
Calumet County	30th	Very Low	33.1	10.1	58.2	15.4
Iowa County	23th	Very Low	31.7	19.5	49.3	19.3
Kewaunee County	17th	Very Low	30.2	9.9	39.7	12.6
Buffalo County	15th	Very Low	24.6	4.3	36.4	1.9
Iron County	11th	Very Low	21.8	7.4	12.2	0.3
Menominee County	9th	Very Low	7.4	3.1	21.5	1.2
Pepin County	7th	Very Low	16.2	2.2	30.9	1.1

Frequently Asked Questions

Which county in Wisconsin has the highest natural disaster risk?

Milwaukee County has the highest natural disaster risk in Wisconsin, rated Relatively High (98th percentile nationally), based on FEMA National Risk Index data.

Which county in Wisconsin is the safest from natural disasters?

Pepin County has the lowest natural disaster risk in Wisconsin, rated Very Low (7th percentile nationally), based on FEMA NRI data.

What natural disasters are most common in Wisconsin?

Wisconsin counties face varying levels of risk from floods, wildfires, tornadoes, earthquakes, and hurricanes. The FEMA National Risk Index scores each county across 18 hazard types. See individual county pages for detailed hazard breakdowns.

How is natural disaster risk measured by county?

The FEMA National Risk Index (NRI) measures natural disaster risk using expected annual loss, social vulnerability, and community resilience. Scores are normalized nationally, with ratings from Very Low to Very High across 18 natural hazard types.

Prepare your household for natural disasters

FEMA's Ready.gov provides county-specific preparedness checklists and emergency planning guides.

FEMA Ready Guide →

Data Source

Risk data sourced from the FEMA National Risk Index (NRI). Risk scores are relative rankings (0–100) across all US counties — not absolute risk measures. Higher scores indicate higher relative risk compared to other counties.

Disclaimer: This data is informational only. It is not financial, insurance, or legal advice. Always consult a qualified professional before making insurance or real estate decisions.

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