Natural Disaster Risk in Alta

Natural Hazard Profile: Alta, Wyoming

Located in the Great Plains in Teton County, Alta is a small community of about 502. The semi-arid climate that characterizes this part of Wyoming — marked by high winds, cold winters, and significant snowfall at elevation — directly influences the types and severity of natural hazards present, making Alta a community where hazard awareness has real practical value.

Alta's overall natural disaster risk is rated 5.6/10 (Moderate) by FEMA's National Risk Index. The threat of avalanche is the primary natural hazard here, with winter snowpack instability on mountain terrain posing risks to roads, structures, and outdoor recreation activities. Secondary hazards include lightning and volcano.

Relative to other U.S. communities, Alta's natural disaster risk is above the U.S. national average of 4.5/10, near the 5.3/10 state average. The hazard distribution here is led by avalanche and lightning, as measured by FEMA across Teton County. While city-specific sub-county variation exists, these scores represent the best available federal risk estimate.

With a moderate risk rating, Alta 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.