Natural Disaster Risk in Hanna

Natural Hazard Profile: Hanna, Utah

Hanna is a small unincorporated community in Duchesne County, in the Great Plains. The area experiences dry conditions, hot summers, and heavy mountain snowfall, with significant avalanche risk in mountain terrain each winter 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 Hanna.

FEMA rates Hanna's composite natural disaster risk at 5.1 out of 10 — moderate risk. Snow avalanche exposure tops the local risk profile, with the area's mountain setting and annual snowfall loading producing regular avalanche cycles on steep slopes. Residents should also account for volcano and landslide risk in their preparedness planning.

Hanna's risk score, slightly below the 5.5/10 state average and above the U.S. national average of 4.5/10. Of the 18 hazard categories tracked by FEMA for Duchesne County, the highest-scoring are avalanche, volcano, and landslide. These scores reflect county-level data and represent the baseline risk that all communities in the county share.

With a moderate risk rating, Hanna 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 avalanche is recommended.