State + disaster type

Severe Storm history in Iowa

Iowa has 742 county-level severe storm declarations across 99 counties. Cherokee County leads with 12 declarations. Total tracked FEMA obligations for severe storm events in this state: $2.1B.

This page shows every Iowa county in Iowa that has at least one FEMA severe storm declaration on record, ranked by how many times that hazard type triggered federal aid. Counties near the top of this list have recurring exposure to severe storm events — useful context for anyone evaluating property risk, insurance needs, or emergency planning in the area.

For the full national view of severe storm declarations across all states, see the severe storm disaster type page. For all hazard types in Iowa, see the Iowa state page.

Severe Storm in Iowa

Counties ranked by severe storm declaration count

#CountyDeclarationsTracked aid
1Cherokee County12$7.6M
2Pottawattamie County12$16.0M
3Story County12$32.9M
4Buchanan County11$5.8M
5Butler County11$21.5M
6Howard County11$9.2M
7Palo Alto County11$4.1M
8Pocahontas County11$1.4M
9Audubon County10$1.9M
10Buena Vista County10$4.3M
11Clayton County10$9.6M
12Des Moines County10$14.0M
13Humboldt County10$7.0M
14Jackson County10$2.2M
15Jones County10$10.8M
16Lee County10$11.0M
17Mitchell County10$3.9M
18Wright County10$6.4M
19Calhoun County9$1.0M
20Clay County9$43.5M
21Crawford County9$13.0M
22Dallas County9$5.9M
23Hamilton County9$4.1M
24Harrison County9$25.5M
25Ida County9$751K
26Iowa County9$2.3M
27Montgomery County9$5.1M
28Sac County9$2.7M
29Winneshiek County9$5.6M
30Black Hawk County8$56.8M
31Boone County8$6.6M
32Chickasaw County8$3.1M
33Dubuque County8$12.9M
34Fayette County8$5.5M
35Floyd County8$8.0M
36Franklin County8$6.8M
37Grundy County8$5.1M
38Guthrie County8$12.6M
39Hardin County8$2.0M
40Jasper County8$15.2M
41Linn County8$627.5M
42Mahaska County8$3.1M
43Marshall County8$18.0M
44Monona County8$6.5M
45Muscatine County8$10.7M
46Shelby County8$19.9M
47Tama County8$9.8M
48Webster County8$6.9M
49Adair County7$11.5M
50Adams County7$2.3M
51Allamakee County7$3.3M
52Appanoose County7$6.1M
53Benton County7$31.9M
54Cedar County7$15.5M
55Davis County7$3.1M
56Delaware County7$9.6M
57Greene County7$5.8M
58Henry County7$1.6M
59Johnson County7$471.8M
60Keokuk County7$1.4M
61Kossuth County7$1.7M
62Mills County7$2.8M
63Polk County7$123.8M
64Poweshiek County7$7.0M
65Union County7$7.9M
66Wapello County7$9.4M
67Washington County7$649K
68Worth County7$1.5M
69Bremer County6$20.8M
70Cass County6$1.6M
71Clinton County6$1.6M
72Dickinson County6$5.8M
73Emmet County6$6.0M
74Louisa County6$17.3M
75Lyon County6$11.7M
76O'Brien County6$9.0M
77Ringgold County6$6.1M
78Scott County6$11.7M
79Sioux County6$48.7M
80Taylor County6$993K
81Van Buren County6$1.4M
82Wayne County6$1.9M
83Winnebago County6$3.6M
84Fremont County5$2.7M
85Hancock County5$1.9M
86Lucas County5$2.3M
87Madison County5$3.9M
88Marion County5$4.1M
89Monroe County5$2.5M
90Warren County5$7.0M
91Woodbury County5$7.7M
92Carroll County4$25.4M
93Cerro Gordo County4$8.8M
94Clarke County4$1.3M
95Decatur County4$2.2M
96Osceola County4$13.0M
97Page County4$3.4M
98Plymouth County4$2.8M
99Jefferson County2$31K