00:00A deadly disaster in Nepal is raising new concerns about megatsunamis in icy mountain regions.
00:06At least 1,399 people died in the recent flash floods near the Nepal-China border.
00:11Another 5,200 people are still reported missing after the disaster.
00:15Experts warn similar landslide-triggered waves could also threaten parts of the United States.
00:21In Alaska's Tracy Arm, a landslide generated a wave measuring 481 meters high.
00:27That made it the second-highest megatsunami ever recorded.
00:30Scientists say rapidly-retreating glaciers can destabilize surrounding mountain slopes.
00:35Thawing permafrost may also weaken the ground holding those slopes together.
00:40Alaska and parts of the Rockies are among the U.S. regions identified as vulnerable.
00:45At least three cruise lines changed their 2026 routes to avoid Tracy Arm.
00:49Experts are calling for better monitoring, cell phone alerts, and evacuation plans,
00:54but predicting exactly when a major mountainside will collapse remains extremely difficult.
00:59Disclosure.
01:00This video contains stock footage and content created or enhanced using AI-assisted tools.
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