Natural Disaster Risk in Gann Valley
South Dakota
Risk Summary for Gann Valley
Gann Valley scores 4.2/10 (Moderate risk), near the U.S. average of 4.5. The leading hazard is Cold Wave.
Top Hazards
All 18 Hazard Scores
How it compares
Live Conditions
🏠 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: Gann Valley, South Dakota
Gann Valley is a small unincorporated community in Buffalo County, in the interior eastern United States. The area experiences harsh winters, hot summers, and significant seasonal variation, with severe blizzards and spring flooding shaping the pattern of natural hazards that residents encounter. Understanding the local risk profile is essential for anyone living in, moving to, or owning property in Gann Valley.
FEMA rates Gann Valley's composite natural disaster risk at 4.2 out of 10 — moderate risk. Cold wave events are the primary hazard risk, driven by periodic invasions of Arctic air that drive wind chills to life-threatening levels and stress heating systems. Residents should also account for wildfire and winter risk in their preparedness planning.
Gann Valley's risk score, slightly below the 4.9/10 state average and near the U.S. national average of 4.5/10. Of the 18 hazard categories tracked by FEMA for Buffalo County, the highest-scoring are cold wave, wildfire, and winter. These scores reflect county-level data and represent the baseline risk that all communities in the county share.
With a moderate risk rating, Gann Valley 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 Gann Valley: Cold Wave preparedness
- Protect pipes, pets, and plants, and ensure heating systems are serviced before winter.
- 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.
Local Factors for Gann Valley
These city-level factors differentiate Gann Valley from other communities in Buffalo County and provide geographic context for its hazard exposure.
Population
79
RuralGeographic Zone
Inland
Reduced coastal hazard exposure
Climate Band
Cool Continental
Latitude 44.1°
Flood Terrain
Minimal — county topography limits flood risk
Flood score: 1.0/10
Wildfire Exposure
Moderate — seasonal fire risk
Fire score: 7.9/10
Coordinates
44.0808° N, 99.0897° W
Buffalo County
Population and coordinates from SimpleMaps US Cities data. Hazard scores from FEMA National Risk Index. Geographic classification derived from coordinates.
Recent Climate Data for Gann Valley
Last 12 months · Source: Open-Meteo archive
Notable Weather Days (last 12 months)
ZIP Codes in Gann Valley
Other cities in South Dakota
Data source: FEMA National Risk Index (NRI). Scores normalized to 1–10 across all US counties. City scores inherit county-level FEMA data. For informational purposes only.