What is the natural disaster risk in Lyman County, South Dakota?

Lyman County, South Dakota has an overall natural disaster risk score of 4.7 out of 10, rated Moderate by FEMA's National Risk Index. Its most significant hazard is Cold Wave.

What natural hazards affect Lyman County, South Dakota?

The leading natural hazards for Lyman County, South Dakota are Cold Wave, Hail, Wildfire. These rankings come from FEMA National Risk Index data for the surrounding county.

How does the disaster risk in Lyman County, South Dakota compare to the rest of the US?

Lyman County, South Dakota's risk score of 4.7/10 is about the same as the U.S. national average of 4.5/10. South Dakota residents can use this to gauge relative exposure to natural hazards.

Natural Disaster Risk in Lyman County

South Dakota

4.7out of 10

Moderate Risk

Risk Summary for Lyman County

Lyman County scores 4.7/10 (Moderate risk), near the U.S. average of 4.5. The leading hazard is Cold Wave.

Top Hazards

Cold Wave Hail Wildfire

All 18 Hazard Scores

Cold Wave

8.2

Wildfire

7.3

Hail

7.3

Winter Weather

7.3

Drought

6.1

Tsunami

5.4

Volcanic Activity

5.1

Coastal Flooding

4.9

Ice Storm

4.8

Avalanche

4.5

Tornado

3.7

Extreme Heat

3.3

Landslide

3.2

Strong Wind

2.6

Earthquake

2.4

Hurricane

2.4

Lightning

2.2

Riverine Flooding

1.0

How it compares

Lyman County

4.7

South Dakota avg.

4.9

US national avg.

4.5

Live Conditions

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🏠 What this means for insurance

Average risk — standard coverage usually sufficient

This area carries average natural disaster risk. A standard homeowners or renters policy should cover common events, but review the exclusions for floods and earthquakes, which are almost never included by default.

This is general information only. Consult a licensed insurance professional for advice specific to your property.

Natural Hazard Profile: Lyman County, South Dakota

Situated in the United States, Lyman County in South Dakota experiences a semi-arid continental climate marked by harsh winters, hot summers, and significant seasonal variation. Severe blizzards and spring flooding is a defining feature of the regional hazard profile that affects residents and property owners countywide.

Lyman County's overall natural disaster risk is rated 4.7/10 (Moderate) by FEMA's National Risk Index. Extreme cold snaps top the local risk profile, with Arctic front passages causing rapid and severe temperature drops that challenge both infrastructure and outdoor safety. Secondary hazards include hail and wildfire.

Relative to other U.S. communities, Lyman County's natural disaster risk is near the U.S. national average of 4.5/10, near the 4.9/10 state average. The hazard distribution here is led by cold wave and hail, as measured by FEMA across Lyman County. While city-specific sub-county variation exists, these scores represent the best available federal risk estimate.

With a moderate risk rating, Lyman County residents are well-served by maintaining standard preparedness practices — an emergency supply kit, awareness of local hazard seasonality, and insurance that covers the top local risks. Periodic review of coverage for cold wave is recommended.

What this means for Lyman County: Cold Wave preparedness

Keep emergency heat and supplies ready in case of cold-related power outages.
Dress in layers and limit exposure during extreme cold to prevent frostbite and hypothermia.
Protect pipes, pets, and plants, and ensure heating systems are serviced before winter.

Cities in Lyman County

Lower Brule4.7/10 Oacoma4.7/10 Presho4.7/10 Reliance4.7/10 Kennebec4.7/10 Vivian4.7/10

ZIP codes in Lyman County

57548Lower Brule4.7 57365Oacoma4.7 57568Presho4.7 57569Reliance4.7 57544Kennebec4.7 57576Vivian4.7

Data source: FEMA National Risk Index (NRI). Scores normalized to 1–10 across all US counties. For informational purposes only.