Tornado Risk in Illinois

All Illinois counties ranked by FEMA National Risk Index tornado score

Tornado risk — violently rotating columns of air capable of catastrophic local damage — is rated for 102 of 102 Illinois counties in FEMA's National Risk Index. Cook County carries the state's highest tornado score at 100.0, with $345M in expected annual tornado losses.

14 Illinois counties are rated High or Very High for tornado, and expected annual losses from tornado total roughly $876M statewide. The full ranking below links to each county's complete 18-hazard risk profile.

County Rankings — Tornado

#CountyTornado ScoreRatingAnn. Freq.Ann. Loss
1 Cook County
100.0
Very High 1.04 / yr $345M
2 DuPage County
99.3
Very High 0.23 / yr $67M
3 Will County
99.2
Very High 0.62 / yr $63M
4 Lake County
98.9
Very High 0.67 / yr $47M
5 Kane County
98.6
High 0.42 / yr $38M
6 Madison County
97.6
High 0.68 / yr $23M
7 Winnebago County
97.3
High 0.44 / yr $19M
8 Sangamon County
97.1
High 0.93 / yr $20M
9 McHenry County
96.3
High 0.44 / yr $25M
10 Peoria County
95.8
High 0.63 / yr $13M
11 St. Clair County
95.5
High 0.58 / yr $13M
12 Champaign County
94.8
High 0.96 / yr $13M
13 Rock Island County
91.0
High 0.42 / yr $7M
14 Tazewell County
90.5
High 0.69 / yr $9M
15 Kendall County
89.7
Medium 0.27 / yr $12M
16 McLean County
89.6
Medium 1.31 / yr $9M
17 DeKalb County
88.1
Medium 0.53 / yr $7M
18 Macon County
86.1
Medium 0.65 / yr $5M
19 Kankakee County
85.9
Medium 0.57 / yr $5M
20 LaSalle County
84.1
Medium 1.08 / yr $5M
21 Stephenson County
82.3
Medium 0.48 / yr $4M
22 Bureau County
81.7
Medium 0.84 / yr $4M
23 Williamson County
80.3
Medium 0.37 / yr $4M
24 Randolph County
80.1
Medium 0.50 / yr $4M
25 Ogle County
79.9
Medium 0.68 / yr $5M
26 Vermilion County
79.7
Medium 0.80 / yr $3M
27 Franklin County
79.3
Medium 0.34 / yr $3M
28 Jefferson County
79.1
Medium 0.45 / yr $3M
29 Whiteside County
78.1
Medium 0.64 / yr $4M
30 Macoupin County
78.0
Medium 0.84 / yr $3M
31 Boone County
77.6
Medium 0.22 / yr $4M
32 Jackson County
74.2
Medium 0.51 / yr $2M
33 Fulton County
74.0
Medium 0.84 / yr $3M
34 Coles County
72.1
Medium 0.43 / yr $3M
35 Montgomery County
71.5
Medium 0.69 / yr $2M
36 Marion County
70.5
Medium 0.46 / yr $2M
37 Henry County
70.4
Medium 0.79 / yr $3M
38 Logan County
69.8
Medium 0.70 / yr $3M
39 Lee County
69.8
Medium 0.67 / yr $3M
40 Grundy County
68.8
Medium 0.39 / yr $5M
41 Jo Daviess County
68.8
Medium 0.52 / yr $2M
42 Saline County
68.5
Medium 0.31 / yr $2M
43 Knox County
67.8
Medium 0.68 / yr $2M
44 Massac County
66.5
Medium 0.21 / yr $2M
45 Clinton County
65.8
Medium 0.42 / yr $2M
46 Effingham County
63.6
Low 0.39 / yr $2M
47 Union County
61.6
Low 0.36 / yr $2M
48 Perry County
60.6
Low 0.37 / yr $2M
49 White County
59.9
Low 0.36 / yr $1M
50 Adams County
58.8
Low 0.56 / yr $2M
51 Bond County
58.5
Low 0.36 / yr $2M
52 Monroe County
58.3
Low 0.33 / yr $3M
53 Iroquois County
57.2
Low 1.02 / yr $2M
54 Johnson County
56.0
Low 0.30 / yr $1M
55 Carroll County
55.9
Low 0.42 / yr $1M
56 Fayette County
53.4
Low 0.64 / yr $1M
57 Menard County
53.2
Low 0.33 / yr $1M
58 Woodford County
52.7
Low 0.56 / yr $2M
59 Livingston County
52.4
Low 1.06 / yr $1M
60 Richland County
52.4
Low 0.25 / yr $1M
61 Mason County
52.1
Low 0.59 / yr $1M
62 McDonough County
52.0
Low 0.50 / yr $1M
63 Morgan County
49.6
Low 0.53 / yr $1M
64 Edgar County
48.1
Low 0.51 / yr $1M
65 Douglas County
47.2
Low 0.37 / yr $979K
66 Wayne County
46.9
Low 0.50 / yr $1M
67 Moultrie County
45.9
Low 0.36 / yr $790K
68 Lawrence County
45.7
Low 0.25 / yr $937K
69 Christian County
44.8
Low 0.75 / yr $1M
70 Crawford County
44.4
Low 0.30 / yr $1M
71 Piatt County
44.3
Low 0.49 / yr $1M
72 Washington County
44.2
Low 0.47 / yr $1M
73 De Witt County
44.1
Low 0.46 / yr $1M
74 Ford County
44.1
Low 0.48 / yr $1M
75 Alexander County
43.2
Low 0.22 / yr $665K
76 Clay County
41.4
Low 0.34 / yr $842K
77 Marshall County
40.4
Low 0.40 / yr $850K
78 Shelby County
39.8
Low 0.76 / yr $998K
79 Jersey County
38.1
Low 0.33 / yr $1M
80 Clark County
37.8
Low 0.36 / yr $756K
81 Pulaski County
37.6
Low 0.18 / yr $529K
82 Hamilton County
37.3
Low 0.32 / yr $939K
83 Gallatin County
37.0
Low 0.26 / yr $475K
84 Hancock County
34.5
Low 0.57 / yr $550K
85 Pike County
33.0
Low 0.63 / yr $597K
86 Putnam County
32.7
Low 0.17 / yr $622K
87 Cass County
32.6
Low 0.35 / yr $602K
88 Greene County
31.9
Low 0.48 / yr $629K
89 Hardin County
31.3
Low 0.15 / yr $467K
90 Cumberland County
30.1
Low 0.29 / yr $443K
91 Edwards County
30.0
Low 0.15 / yr $369K
92 Pope County
29.7
Low 0.32 / yr $459K
93 Jasper County
29.4
Low 0.36 / yr $670K
94 Wabash County
29.1
Low 0.15 / yr $441K
95 Henderson County
28.6
Low 0.33 / yr $340K
96 Warren County
28.5
Low 0.49 / yr $529K
97 Schuyler County
27.6
Low 0.37 / yr $340K
98 Stark County
25.7
Very Low 0.30 / yr $451K
99 Mercer County
22.5
Very Low 0.53 / yr $467K
100 Calhoun County
18.8
Very Low 0.24 / yr $261K
101 Brown County
17.7
Very Low 0.23 / yr $206K
102 Scott County
15.2
Very Low 0.21 / yr $229K

102 Illinois counties with measurable tornado risk. See the national tornado ranking or all Illinois counties by overall risk.

Frequently Asked Questions

Which Illinois county has the highest tornado risk?

Cook County has the highest FEMA tornado risk score in Illinois at 100.0 (Very High), with $345M in expected annual losses and about 1.04 events per year.

How many Illinois counties face significant tornado risk?

102 Illinois counties record measurable tornado risk in FEMA's National Risk Index; 14 of them are rated High or Very High.

Other Hazards in Illinois

Cold Wave Drought Earthquake Hail Heat Wave Hurricane Ice Storm Riverine Flood Landslide Lightning Strong Wind Wildfire Winter Weather