How To Prepare For An Tsunami

Tsunamis are powerful ocean waves that can cause catastrophic damage when they reach the coast. While the likelihood of a tsunami depends on geographic location, anyone living near a shoreline can benefit from a clear preparation plan. Below is a step‑by‑step guide that blends scientific facts with practical steps to keep you and your family safe.

1. Understand What a Tsunami Is

A tsunami is not a single wave but a series of waves that travel across the ocean at speeds up to 500 miles per hour. They are usually triggered by:

Under‑sea earthquakes
Volcanic eruptions
Under‑sea landslides
Meteorite impacts

Because the energy source is often far from shore, the waves can arrive with little warning. NOAA’s quick‑draw video explains how these waves form and why they can be so destructive.

Key Facts

Wave height can reach 30–40 feet or more.
Tsunami waves can travel over 200 miles inland.
First 15 minutes after an earthquake is critical for evacuation.

2. Build a Personal Preparedness Plan

Having a plan in place before a tsunami strikes is the best way to protect yourself and your loved ones.

Know the Warning System: Subscribe to local emergency alerts, NOAA’s Tsunami Warning System, and any regional siren networks.
Identify Safe Zones: Map out at least two evacuation routes that lead to higher ground or inland. Avoid low‑lying streets and coastal roads.
Set a Meeting Point: Choose a central location far from the coast where everyone can regroup after evacuation.

3. Create a Family Evacuation Plan

All family members should know exactly what to do when a tsunami warning is issued.

Listen for the first alert—this could be a siren, a radio broadcast, or a text notification.
Immediately move to the pre‑identified safe zone.
Do not wait for official confirmation; the “when” is more important than the “if.”
Keep the phone charged and use a battery backup if possible.