Cold Wave Risk in South Dakota

All South Dakota counties ranked by FEMA National Risk Index cold wave score

Cold Wave risk — prolonged spells of dangerously low temperatures — is rated for 66 of 66 South Dakota counties in FEMA's National Risk Index. Dewey County carries the state's highest cold wave score at 99.0, with $20M in expected annual cold wave losses.

5 South Dakota counties are rated High or Very High for cold wave, and expected annual losses from cold wave total roughly $188M statewide. The full ranking below links to each county's complete 18-hazard risk profile.

County Rankings — Cold Wave

#CountyCold Wave ScoreRatingAnn. Freq.Ann. Loss
1 Dewey County
99.0
Very High 9.21 / yr $20M
2 Brown County
96.4
High 13.37 / yr $16M
3 Brule County
96.4
High 6.47 / yr $14M
4 Minnehaha County
96.0
High 8.53 / yr $17M
5 Corson County
91.8
High 10.11 / yr $5M
6 Walworth County
88.8
Medium 11.16 / yr $5M
7 Ziebach County
87.8
Medium 7.79 / yr $3M
8 Charles Mix County
87.2
Medium 5.84 / yr $5M
9 Pennington County
85.7
Medium 4.96 / yr $5M
10 Tripp County
83.3
Medium 5.47 / yr $3M
11 Codington County
82.3
Medium 13.37 / yr $5M
12 Roberts County
80.0
Medium 14.37 / yr $3M
13 Lyman County
79.6
Medium 5.74 / yr $2M
14 Grant County
78.4
Medium 13.63 / yr $5M
15 Buffalo County
77.4
Medium 7.16 / yr $2M
16 Beadle County
77.3
Medium 9.95 / yr $3M
17 Aurora County
77.1
Medium 7.00 / yr $3M
18 Brookings County
77.0
Medium 11.79 / yr $4M
19 Todd County
76.4
Medium 5.32 / yr $2M
20 Day County
76.0
Medium 14.11 / yr $2M
21 Gregory County
75.7
Medium 5.58 / yr $3M
22 Yankton County
73.3
Medium 6.42 / yr $2M
23 McPherson County
71.7
Medium 12.47 / yr $2M
24 Oglala Lakota County
71.3
Medium 4.84 / yr $1M
25 Marshall County
70.6
Medium 14.26 / yr $2M
26 Potter County
70.5
Medium 10.16 / yr $2M
27 Jerauld County
69.1
Medium 8.32 / yr $2M
28 Davison County
67.1
Medium 7.74 / yr $2M
29 Hutchinson County
67.0
Medium 6.74 / yr $2M
30 Spink County
66.6
Medium 11.68 / yr $3M
31 Faulk County
65.4
Low 11.21 / yr $1M
32 Lake County
65.0
Low 10.21 / yr $2M
33 Douglas County
62.6
Low 6.26 / yr $2M
34 Butte County
61.1
Low 6.74 / yr $1M
35 Meade County
59.5
Low 6.39 / yr $2M
36 Hand County
59.4
Low 9.05 / yr $2M
37 Haakon County
59.0
Low 6.21 / yr $1M
38 Lincoln County
58.9
Low 7.63 / yr $2M
39 Lawrence County
58.3
Low 4.26 / yr $1M
40 Clark County
56.5
Low 12.47 / yr $2M
41 Edmunds County
55.4
Low 11.95 / yr $2M
42 Kingsbury County
53.8
Low 10.79 / yr $2M
43 Jackson County
53.3
Low 5.63 / yr $572K
44 Sully County
51.1
Low 7.74 / yr $2M
45 Hughes County
51.0
Low 6.68 / yr $2M
46 Bon Homme County
50.8
Low 6.21 / yr $1M
47 Turner County
50.6
Low 7.16 / yr $1M
48 Hamlin County
50.2
Low 12.74 / yr $1M
49 Perkins County
50.2
Low 8.57 / yr $1M
50 Hyde County
47.9
Low 8.63 / yr $658K
51 Moody County
47.4
Low 10.84 / yr $844K
52 Hanson County
47.3
Low 7.89 / yr $610K
53 Deuel County
46.7
Low 13.11 / yr $1M
54 Campbell County
45.5
Low 11.21 / yr $1M
55 Mellette County
43.4
Low 5.47 / yr $443K
56 Bennett County
42.6
Low 5.11 / yr $415K
57 Fall River County
42.2
Low 4.28 / yr $480K
58 McCook County
38.5
Low 8.11 / yr $969K
59 Union County
34.8
Low 6.47 / yr $734K
60 Miner County
34.3
Low 9.74 / yr $932K
61 Sanborn County
26.9
Low 8.89 / yr $529K
62 Custer County
23.3
Very Low 3.98 / yr $399K
63 Clay County
22.9
Very Low 6.32 / yr $434K
64 Jones County
22.1
Very Low 5.74 / yr $356K
65 Harding County
21.5
Very Low 8.05 / yr $354K
66 Stanley County
19.4
Very Low 6.11 / yr $297K

66 South Dakota counties with measurable cold wave risk. See the national cold wave ranking or all South Dakota counties by overall risk.

Frequently Asked Questions

Which South Dakota county has the highest cold wave risk?

Dewey County has the highest FEMA cold wave risk score in South Dakota at 99.0 (Very High), with $20M in expected annual losses and about 9.21 events per year.

How many South Dakota counties face significant cold wave risk?

66 South Dakota counties record measurable cold wave risk in FEMA's National Risk Index; 5 of them are rated High or Very High.

Other Hazards in South Dakota