Union County, South Dakota
FEMA National Risk Index threat assessment for Union County.
Threat Level
Guarded
NRI Composite Score
4.1
Social Vulnerability
16.5
Community Resilience
58.8
Top Hazards
Tornado
7.9
Very Low
Cold Wave
6.8
Relatively Low
Inland Flooding
5.8
Relatively Low
Strong Wind
5.6
Very Low
Ice Storm
5.4
Very Low
Winter Weather
5.0
Very Low
Drought
4.3
Very Low
Hail
4.2
Very Low
Lightning
3.5
Very Low
Landslide
2.7
Very Low
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