Natural Disaster Risk in Twin Falls County

Natural Hazard Profile: Twin Falls County, Idaho

Twin Falls County is located in the United States in Idaho, home to roughly 89,972 residents. The county experiences dry summers, cold winters, and significant wildfire risk, with a high fire danger period from July through September shaping the natural hazards faced by its communities. FEMA assesses risk at this county level, providing the baseline for every city and ZIP code within its boundaries.

FEMA rates Twin Falls County's composite natural disaster risk at 6.3 out of 10 — high risk. The threat from nearby active volcanoes tops the local risk profile, with potential hazards including ash fall that disrupts air travel and agriculture, and lava that threatens infrastructure. Residents should also account for winter and wildfire risk in their preparedness planning.

Twin Falls County's risk score, slightly above the 5.1/10 state average and above the U.S. national average of 4.5/10. Of the 18 hazard categories tracked by FEMA for Twin Falls County, the highest-scoring are volcano, winter, and wildfire. These scores reflect county-level data and represent the baseline risk that all communities in the county share.

With a high natural disaster risk rating, Twin Falls County residents benefit from taking preparedness seriously. Reviewing insurance coverage for volcano 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.