Special Report

50 Most Dangerous Volcanoes in America

Thomas C. Frohlich

Source: Ewen Denney / Wikimedia Commons

5. Shasta, California
> Threat score: 210
> Last eruption year: 1786
> Pop. within 30 km: 19,785
> Pop. within 100 km: 265,016

Source: Craig Mitchelldyer / Getty Images

4. Hood, Oregon
> Threat score: 213
> Last eruption year: 1866
> Pop. within 30 km: 9,721
> Pop. within 100 km: 2,067,520

Source: Stan Shebs / Wikimedia Commons

3. Rainier, Washington
> Threat score: 244
> Last eruption year: 1450
> Pop. within 30 km: 3,187
> Pop. within 100 km: 2,667,609

Source: Steve Schillling / The U.S. Geological Survey via Getty Images

2. St. Helens, Washington
> Threat score: 267
> Last eruption year: 2008
> Pop. within 30 km: 2,221
> Pop. within 100 km: 2,173,101

Source: Mario Tama / Getty Images

1. Kilauea, Hawaii
> Threat score: 324
> Last eruption year: 2018
> Pop. within 30 km: 8,495
> Pop. within 100 km: 169,550