Natural Disaster Risk in Brown County

Natural Hazard Profile: Brown County, South Dakota

Brown County, in the United States in South Dakota, is characterized by its semi-arid continental climate — harsh winters, hot summers, and significant seasonal variation. The county faces severe blizzards and spring flooding, and its FEMA risk assessment establishes the hazard baseline shared by all the towns and cities it contains.

According to FEMA's National Risk Index, Brown County carries an overall risk score of 6.1/10, placing it in the high category. Winter weather is the dominant natural hazard, with the area facing heavy snowfall, ice accumulation, and bitter cold that can immobilize infrastructure and create dangerous travel conditions. The area also faces notable exposure to cold wave and hail.

Within South Dakota, Brown County's risk is, slightly above the 4.9/10 state average. Nationally, it ranks above the U.S. national average of 4.5/10. FEMA's analysis of Brown County identifies winter as the foremost hazard, followed by cold wave and hail. These rankings reflect the relative frequency and severity of each hazard type in the local environment.

With a high natural disaster risk rating, Brown County residents benefit from taking preparedness seriously. Reviewing insurance coverage for winter and secondary hazards, registering for emergency alerts, and maintaining a household emergency kit are practical steps that can significantly reduce impact during a major event.