The primary risks of volcanic megatsunamis include massive waves that can devastate coastal communities, causing significant loss of life and property. A collapse of the Cumbre Vieja volcano could generate waves up to 20 meters (65 feet) high, reaching Florida within nine hours. The west coast of the U.S. is also at risk from potential collapses of Hawaiian volcanoes, which could produce waves as high as 60–70 meters (200–230 feet). These events are rare but catastrophic, with the potential to cause widespread destruction.