Tsunami safety: what to do before, during, and after an alert

When a tsunami warning is issued, acting quickly and knowledgeably can save lives.

On July 29, a magnitude 8.8 earthquake —the sixth largest ever recorded— struck Russia. As a result of the powerful quake, tsunami warnings were issued in several countries across the Pacific Ocean. Although many of these alerts have since been lifted, the U.S. National Weather Service urged residents of coastal areas to remain vigilant for at least 24 hours, as waves continue to be observed persistently.

The first tsunami waves hit the coasts of Russia and Japan, where nearly two million people were evacuated as a precaution. Later that night, the phenomenon also reached the U.S. coastline, affecting parts of Hawaii, California, Oregon, Washington, and Alaska.

When a tsunami warning is issued, acting quickly and knowledgeably can save lives. These natural events —usually triggered by undersea earthquakes— can generate powerful waves that reach coastal areas within minutes or hours. Below are key recommendations to help you stay safe.

How to Stay Safe During a Tsunami Alert

1. Stay Informed

Follow official sources such as news broadcasts, radio, television, and verified social media accounts to stay updated. Civil Protection, Tsunami Warning Centers, or national weather services are reliable sources in these situations.

2. Act Quickly

Evacuate as soon as local or national authorities instruct you to. Move to higher ground or inland. Once evacuated, do not return until the proper authorities confirm it is safe to do so. The first waves are not always the most destructive; additional waves may arrive hours after the initial event.

3. Have an Emergency Plan

Know the evacuation routes and identify safe zones in your area. Prepare an emergency kit with water, non-perishable food, a flashlight, battery-powered radio, medications, and important documents.

During the alert

Avoid beaches and rivers near the coast.
Stay constantly informed.
Assist vulnerable individuals: children, the elderly, and people with disabilities should receive priority help during evacuation.
Know your local evacuation routes.
Choose a safe shelter in elevated terrain or far from the coast.
Have emergency supplies ready.