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

Illinois Disaster Risk

Natural disaster risk data for all 102 counties.

Avg FEMA Rating

Relatively Low

Avg Percentile

55th

Counties with Data

102

of 102 total

County risk atlas

Illinois 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

102/102

Avg composite

55th

Risk layers

Highest Risk Counties

Cook County

Very High

100th percentile

DuPage County

Relatively High

98th percentile

Will County

Relatively High

97th percentile

Lake County

Relatively High

96th percentile

St. Clair County

Relatively High

95th percentile

Lowest Risk Counties

Scott County

Very Low

3th percentile

Brown County

Very Low

5th percentile

Calhoun County

Very Low

6th percentile

Stark County

Very Low

7th percentile

Hardin County

Very Low

8th percentile

All Illinois Counties

County	Percentile	FEMA Rating	Flood	Wildfire	Tornado	Earthquake
Cook County	100th	Very High	99.9	55.8	100.0	98.4
DuPage County	98th	Relatively High	98.0	33.7	99.3	93.2
Will County	97th	Relatively High	97.9	56.2	99.2	90.3
Lake County	96th	Relatively High	97.2	44.9	98.9	85.7
St. Clair County	95th	Relatively High	94.5	15.1	95.5	98.0
Kane County	95th	Relatively High	95.5	32.7	98.6	86.4
Madison County	93th	Relatively Moderate	92.3	14.8	97.6	97.1
Winnebago County	92th	Relatively Moderate	94.4	32.7	97.3	80.0
Sangamon County	92th	Relatively Moderate	91.2	18.8	97.1	94.6
McHenry County	91th	Relatively Moderate	93.1	31.6	96.3	74.7
Peoria County	91th	Relatively Moderate	88.7	9.8	95.8	79.9
Champaign County	90th	Relatively Moderate	90.4	16.2	94.8	89.5
Kankakee County	88th	Relatively Moderate	92.5	20.3	85.9	80.5
Jackson County	87th	Relatively Moderate	76.5	11.5	74.2	96.7
McLean County	87th	Relatively Moderate	85.2	8.9	89.6	82.3
LaSalle County	86th	Relatively Moderate	88.2	21.3	84.1	82.4
Williamson County	86th	Relatively Moderate	69.9	14.2	80.3	96.3
Tazewell County	84th	Relatively Moderate	84.4	8.0	90.5	79.7
Rock Island County	84th	Relatively Moderate	79.5	8.7	91.0	62.3
Macon County	83th	Relatively Moderate	83.3	21.2	86.1	89.9
Franklin County	81th	Relatively Low	65.7	5.8	79.3	95.4
DeKalb County	81th	Relatively Low	83.0	6.4	88.1	75.8
Kendall County	80th	Relatively Low	79.7	14.2	89.7	66.5
Macoupin County	80th	Relatively Low	68.7	9.3	78.0	94.1
Vermilion County	79th	Relatively Low	76.5	22.7	79.7	85.2
Randolph County	79th	Relatively Low	57.8	6.2	80.1	95.5
Jefferson County	77th	Relatively Low	59.0	9.7	79.1	95.8
Marion County	77th	Relatively Low	68.1	15.5	70.5	95.0
Iroquois County	74th	Relatively Low	79.6	3.5	57.2	71.1
Stephenson County	74th	Relatively Low	77.9	27.0	82.3	57.7
Perry County	72th	Relatively Low	49.8	3.8	60.6	94.3
Livingston County	72th	Relatively Low	81.1	2.6	52.4	71.2
Morgan County	71th	Relatively Low	61.2	1.8	49.6	81.7
Ogle County	71th	Relatively Low	77.0	11.4	79.9	63.8
Coles County	70th	Relatively Low	74.5	9.5	72.1	87.3
Saline County	70th	Relatively Low	57.4	8.6	68.5	94.1
Grundy County	67th	Relatively Low	66.5	15.7	68.8	56.3
Whiteside County	66th	Relatively Low	70.1	14.1	78.1	62.7
Clinton County	66th	Relatively Low	64.0	7.9	65.8	91.2
Montgomery County	65th	Relatively Low	58.7	13.6	71.5	90.4
Adams County	64th	Relatively Low	60.7	5.2	58.8	64.6
Bureau County	62th	Relatively Low	63.4	13.0	81.7	74.0
Douglas County	62th	Relatively Low	60.1	4.2	47.2	76.4
Massac County	62th	Relatively Low	43.0	7.6	66.5	93.6
Fulton County	59th	Relatively Low	57.6	4.9	74.0	78.8
Logan County	58th	Relatively Low	53.7	1.5	69.8	76.8
Boone County	57th	Relatively Low	63.9	8.3	77.6	45.6
Knox County	57th	Relatively Low	49.4	1.1	67.8	58.4
Henry County	57th	Relatively Low	51.5	7.1	70.4	58.1
Union County	55th	Relatively Low	38.9	9.2	61.6	90.1
Washington County	55th	Relatively Low	39.0	3.9	44.2	90.5
Lee County	54th	Relatively Low	62.5	9.4	69.8	49.6
White County	54th	Relatively Low	44.3	2.2	59.9	91.9
Christian County	54th	Relatively Low	41.5	9.0	44.8	87.2
Effingham County	54th	Relatively Low	49.2	10.9	63.6	88.5
Shelby County	52th	Relatively Low	48.3	12.6	39.8	78.7
Jo Daviess County	51th	Relatively Low	58.5	21.5	68.8	28.1
Johnson County	51th	Relatively Low	37.9	11.3	56.0	91.0
Lawrence County	49th	Relatively Low	58.2	0.5	45.7	85.5
Pulaski County	49th	Relatively Low	15.1	0.7	37.6	91.2
Fayette County	49th	Relatively Low	49.5	15.8	53.4	86.1
Richland County	47th	Relatively Low	41.3	2.7	52.4	89.6
Moultrie County	45th	Relatively Low	49.1	4.3	45.9	75.2
Alexander County	44th	Relatively Low	40.5	2.1	43.2	90.2
Mason County	43th	Relatively Low	47.2	1.6	52.1	63.8
Monroe County	42th	Very Low	32.3	1.9	58.3	84.5
Clay County	41th	Very Low	38.9	5.3	41.4	86.3
Wayne County	41th	Very Low	35.4	1.5	46.9	86.4
Woodford County	40th	Very Low	51.5	3.3	52.7	54.4
Carroll County	39th	Very Low	46.5	13.1	55.9	31.6
Cass County	39th	Very Low	28.1	0.3	32.6	47.6
McDonough County	38th	Very Low	21.1	0.9	52.0	59.6
Crawford County	37th	Very Low	43.7	2.0	44.4	84.8
Bond County	36th	Very Low	30.5	7.5	58.5	86.5
Piatt County	35th	Very Low	43.7	4.0	44.3	66.4
Edgar County	35th	Very Low	30.0	10.0	48.1	82.6
Gallatin County	34th	Very Low	36.0	1.2	37.0	84.5
Hancock County	31th	Very Low	24.2	1.4	34.5	40.6
Hamilton County	31th	Very Low	12.5	1.1	37.3	90.7
Pike County	30th	Very Low	33.7	1.0	33.0	47.7
De Witt County	29th	Very Low	30.3	2.1	44.1	65.7
Menard County	29th	Very Low	29.4	3.6	53.2	68.0
Clark County	27th	Very Low	31.0	8.1	37.8	80.9
Marshall County	27th	Very Low	35.1	4.4	40.4	54.5
Ford County	26th	Very Low	35.6	1.8	44.1	59.6
Edwards County	26th	Very Low	21.5	0.8	30.0	83.7
Cumberland County	26th	Very Low	33.5	4.7	30.1	76.5
Wabash County	25th	Very Low	25.8	0.4	29.1	86.0
Jasper County	20th	Very Low	28.4	2.4	29.4	75.6
Jersey County	19th	Very Low	18.0	0.5	38.1	64.3
Henderson County	18th	Very Low	24.7	1.7	28.6	27.6
Warren County	15th	Very Low	11.0	0.2	28.5	34.4
Pope County	15th	Very Low	17.2	8.2	29.7	82.1
Greene County	13th	Very Low	13.2	0.3	31.9	55.8
Schuyler County	11th	Very Low	8.2	0.3	27.6	35.5
Putnam County	9th	Very Low	19.6	4.4	32.7	39.9
Mercer County	9th	Very Low	9.2	1.1	22.5	24.7
Hardin County	8th	Very Low	15.5	5.3	31.3	69.0
Stark County	7th	Very Low	11.2	0.8	25.7	30.4
Calhoun County	6th	Very Low	16.1	0.6	18.8	33.8
Brown County	5th	Very Low	4.1	0.2	17.7	28.0
Scott County	3th	Very Low	5.1	0.1	15.2	28.8

Frequently Asked Questions

Which county in Illinois has the highest natural disaster risk?

Cook County has the highest natural disaster risk in Illinois, rated Very High (100th percentile nationally), based on FEMA National Risk Index data.

Which county in Illinois is the safest from natural disasters?

Scott County has the lowest natural disaster risk in Illinois, rated Very Low (3th percentile nationally), based on FEMA NRI data.

What natural disasters are most common in Illinois?

Illinois 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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