Natural Disaster Risk in Arco

Natural Hazard Profile: Arco, Idaho

Arco is a small community of about 1,349 in Butte County, in the Great Plains. The area experiences dry summers, cold winters, and significant wildfire risk, with a high fire danger period from July through September 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 Arco.

According to FEMA's National Risk Index, Arco carries an overall risk score of 4.3/10, placing it in the moderate category. 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. The area also faces notable exposure to volcano and wildfire.

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

With a moderate risk rating, Arco 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.