Hawaii Could Be Devastated By A Tsunami Within 50 Years

HONOLULU -- On the south side of the Hawaiian island of Kauai lies Makauwahi, a massive cave and sinkhole where scientists have uncovered evidence of an enormous tsunami that struck Hawaii about 500 years ago.

Triggered by a 9.0-magnitude earthquake off the coast of the Aleutian Islands in Alaska, the tsunami likely brought waves up to 30 feet -- enough to devastate Hawaii's coastal populations, infrastructure and economy today.