00:00Scientists are warning about a terrifying danger on the West Coast.
00:03Melting glaciers in Alaska are becoming unstable right now.
00:07Huge chunks of ice and rock could suddenly collapse into the ocean.
00:11And that could create massive tsunami waves within minutes.
00:14Some areas may not even have enough time to evacuate.
00:18But that's only part of the threat.
00:20Scientists are also tracking the massive Cascadia fault line.
00:24Experts say it could produce a devastating mega-earthquake.
00:27The last one happened over 300 years ago.
00:30And it sent a tsunami all the way to Japan.
00:33Now researchers fear something even worse could happen next.
00:37The Cascadia fault and the San Andreas fault may trigger each other.
00:41That means multiple giant earthquakes could strike almost back-to-back.
00:45Cities like Seattle, Portland, San Francisco, and Vancouver could all be affected.
00:51Experts say climate change and rising sea levels are increasing the risks.
00:55And nobody knows exactly when this could happen.
00:59But scientists agree on one thing.
01:01Preparation is becoming more important than ever before.
01:04Because when nature finally moves, millions of lives could change in minutes.
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