SkyGround

Natural hazard risk & disaster history for every US county

All counties › Hazards › Drought

Iowa drought risk

99 counties scored 0 rated Very High

Davis County has the highest drought risk in Iowa, scoring 98.7 out of 100 — rated "Relatively High" by FEMA's National Risk Index.

# County NRI score Rating NOAA events
2016–2026
1 Davis County 98.7 Relatively High 0
2 Crawford County 98.4 Relatively High 0
3 Pocahontas County 98.2 Relatively High 0
4 Marshall County 97.9 Relatively High 0
5 Wright County 97.9 Relatively High 0
6 Audubon County 97.8 Relatively High 0
7 Cass County 97.6 Relatively High 0
8 Cerro Gordo County 97.6 Relatively High 0
9 Taylor County 97.4 Relatively High 0
10 Tama County 97.3 Relatively High 0
11 Wapello County 97.2 Relatively High 0
12 Calhoun County 97.1 Relatively High 0
13 Greene County 96.9 Relatively High 0
14 Emmet County 96.8 Relatively High 0
15 Black Hawk County 96.7 Relatively High 0
16 Hardin County 96.4 Relatively High 0
17 Story County 96.4 Relatively High 0
18 Appanoose County 96.3 Relatively High 0
19 Hamilton County 96.3 Relatively High 0
20 Winnebago County 96.1 Relatively High 0
21 Webster County 96 Relatively High 0
22 Jasper County 95.8 Relatively High 0
23 Franklin County 95.7 Relatively High 0
24 Adams County 95.6 Relatively High 0
25 Union County 95.4 Relatively High 0
26 Hancock County 95.3 Relatively High 0
27 Humboldt County 95.3 Relatively High 0
28 Poweshiek County 95.3 Relatively High 0
29 Boone County 95 Relatively High 0
30 Madison County 95 Relatively High 0
31 Guthrie County 94.9 Relatively High 0
32 Polk County 94.8 Relatively High 0
33 Wayne County 94.8 Relatively High 0
34 Carroll County 94.7 Relatively High 0
35 Adair County 94.6 Relatively High 0
36 Lucas County 94.4 Relatively High 0
37 Decatur County 94.2 Relatively High 0
38 Floyd County 93.9 Relatively High 0
39 Kossuth County 93.9 Relatively High 0
40 Ringgold County 93.8 Relatively High 0
41 Dallas County 93.4 Relatively High 0
42 Clarke County 92.6 Relatively High 0
43 Clinton County 92.4 Relatively High 0
44 Sac County 92 Relatively High 0
45 Warren County 91.7 Relatively High 0
46 Woodbury County 90.5 Relatively Moderate 0
47 Mitchell County 90.3 Relatively Moderate 0
48 Plymouth County 90.3 Relatively Moderate 0
49 Monroe County 90.2 Relatively Moderate 0
50 Pottawattamie County 89.5 Relatively Moderate 0
51 Monona County 89.3 Relatively Moderate 0
52 Worth County 89.3 Relatively Moderate 0
53 Grundy County 89.2 Relatively Moderate 0
54 Butler County 88.5 Relatively Moderate 0
55 Marion County 88.5 Relatively Moderate 0
56 Linn County 87.7 Relatively Moderate 0
57 Chickasaw County 86.9 Relatively Moderate 0
58 Harrison County 86.4 Relatively Moderate 0
59 Fayette County 86.3 Relatively Moderate 0
60 Bremer County 86.2 Relatively Moderate 0
61 Page County 85.6 Relatively Moderate 0
62 Des Moines County 85 Relatively Moderate 0
63 Mahaska County 83.9 Relatively Moderate 0
64 Scott County 83.3 Relatively Moderate 0
65 Palo Alto County 83 Relatively Moderate 0
66 Benton County 82.9 Relatively Moderate 0
67 Lee County 82.9 Relatively Moderate 0
68 Montgomery County 82.7 Relatively Moderate 0
69 Jefferson County 82.3 Relatively Moderate 0
70 Van Buren County 82.2 Relatively Moderate 0
71 Johnson County 81.8 Relatively Moderate 0
72 Buchanan County 81.1 Relatively Moderate 0
73 Delaware County 81 Relatively Moderate 0
74 Keokuk County 80.5 Relatively Moderate 0
75 Cedar County 80.3 Relatively Moderate 0
76 Cherokee County 80.3 Relatively Moderate 0
77 Muscatine County 80.2 Relatively Moderate 0
78 Fremont County 79.8 Relatively Moderate 0
79 Washington County 79 Relatively Moderate 0
80 Shelby County 78.8 Relatively Moderate 0
81 Jackson County 78.5 Relatively Moderate 0
82 Henry County 78.3 Relatively Moderate 0
83 Howard County 78.3 Relatively Moderate 0
84 Ida County 78 Relatively Moderate 0
85 Louisa County 77.3 Relatively Moderate 0
86 Jones County 76.4 Relatively Moderate 0
87 Winneshiek County 75.6 Relatively Moderate 0
88 Iowa County 75.2 Relatively Moderate 0
89 Buena Vista County 74.6 Relatively Moderate 0
90 Lyon County 72 Relatively Moderate 0
91 Sioux County 71.5 Relatively Moderate 0
92 Dubuque County 68.4 Relatively Moderate 0
93 O'Brien County 67.1 Relatively Moderate 0
94 Mills County 65.3 Relatively Moderate 0
95 Clayton County 64.3 Relatively Moderate 0
96 Clay County 61.7 Relatively Low 0
97 Osceola County 59.4 Relatively Low 0
98 Allamakee County 50.4 Relatively Low 0
99 Dickinson County 43 Relatively Low 0

Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.

Drought risk nationally:

Top 50 US counties

Other hazard risks in Iowa:

WildfireInland FloodingCoastal FloodingEarthquakeHeat WaveTornadoHurricaneHailStrong WindWinter WeatherIce StormCold WaveLightningLandslideAvalancheTsunamiVolcanic Activity

Frequently asked questions

What is the highest drought risk county in Iowa?

Davis County, IA has the highest drought risk in Iowa, with a FEMA National Risk Index score of 98.7 out of 100 (rated "Relatively High").

What causes drought risk in Iowa?

Drought risk captures expected annual losses from prolonged precipitation deficits affecting agriculture, water supply, and ecosystems. High scores cover the western Great Plains, Southwest, and California's Central Valley. Climate change is increasing drought frequency and severity across much of the US, with multi-year droughts becoming more common in the West.