Natural Disaster Risk in Glenham

Natural Hazard Profile: Glenham, South Dakota

Located in the northern tier of the continental United States in Walworth County, Glenham is a small unincorporated community. The semi-arid continental climate that characterizes this part of South Dakota — marked by harsh winters, hot summers, and significant seasonal variation — directly influences the types and severity of natural hazards present, making Glenham a community where hazard awareness has real practical value.

Glenham's overall natural disaster risk is rated 4.6/10 (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 winter and wildfire.

Relative to other U.S. communities, Glenham'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 winter, as measured by FEMA across Walworth County. While city-specific sub-county variation exists, these scores represent the best available federal risk estimate.

With a moderate risk rating, Glenham 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.