Tsunamis | Ready.gov

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class="hidden"></div> <div id="block-uswds-ready-page-title" class="block block-core block-page-title-block"> <h1 class="uswds-page-title page-title"><span class="field field--name-title field--type-string field--label-hidden">Tsunamis</span> </h1> </div> <div class="views-element-container block block-views block-views-blocktranslations-available-block-1" id="block-views-block-translations-available-block-1"> <div><div class="view view-translations-available view-id-translations_available view-display-id-block_1 js-view-dom-id-102f3d551a04e216736e50d52e175e24816a8711cbfd7be9d58e34738c033669"> <div class="view-content"> <div class="grid-container"> <div class="grid-row"> <div class="translations-available"> <img src="/profiles/readyd8_gov/themes/uswds_ready/img/world-icon-black.png" alt="world globe"> <ul> <li><span><a href="/ar/tsunamis">العربية</a></span> </li> <li><span class="translation-first"><span><a href="/tsunamis">English</a></span></span> </li> <li><span><a href="/es/tsunamis">Español</a></span> </li> <li><span><a href="/fr/tsunamis">Français</a></span> </li> <li><span><a href="/ht/tsunamis">Kreyòl</a></span> </li> <li><span><a href="/ja/tsunamis">日本語</a></span> </li> <li><span><a href="/ko/tsunamis">한국어</a></span> </li> <li><span><a href="/ru/tsunamis">Русский</a></span> </li> <li><span><a href="/tl/tsunamis">Tagalog</a></span> </li> <li><span><a href="/vi/tsunamis">Tiếng Việt</a></span> </li> <li><span><a href="/zh-hans/tsunamis">简体中文</a></span> </li> </ul> </div> </div> </div> </div> </div> </div> </div> <div id="block-uswds-ready-ready2017-system-main" class="block block-system block-system-main-block"> <article data-history-node-id="3636"> <div> <div class="layout layout--onecol"> <div class="layout__region layout__region--content"> <div class="clearfix text-formatted field field--name-body field--type-text-with-summary field--label-hidden field__item"> <a class="fema-link" href="#prepare"><p>Prepare Now</p></a> <a class="fema-link" href="#during"><p>Survive During</p></a> <a class="fema-link" href="#after"><p>Be Safe After</p></a> <a class="fema-link" href="#content"><p>Related Content</p></a> <div class="fema-callout fcf6f6 alert"><img src="/profiles/readyd8_gov/themes/uswds_ready/img/alert.svg" alt="alert - warning"/> <p>If you are a disaster survivor, please visit <a href="http://www.fema.gov">FEMA.gov</a> for up-to-date information on current disaster declarations. If you have questions about your disaster assistance application, you can call (800) 621-3362, visit <a href="http://www.disasterassistance.gov/">disasterassistance.gov</a> or use the <a href="https://www.fema.gov/about/news-multimedia/mobile-app-text-messages">FEMA mobile app</a>. </p> </div> <p>A tsunami is a series of enormous ocean waves caused by earthquakes, underwater landslides, volcanic eruptions or asteroids. A tsunami can kill or injure people and damage or destroy buildings and infrastructure as waves come in and go out. Tsunamis can:</p> <div class="wp-block-fema-feature-mini feature_mini"><figure class="feature_mini__image" style="background-image:url('/sites/default/files/2022-03/icon_tsunami-wave.png')"><img class="feature_mini__image_img" alt="feature_mini img" src="/sites/default/files/2022-03/icon_tsunami-wave.png" data-entity-type="file" data-entity-uuid="77ff77d8-c834-46cc-943d-ba8538fd47df" data-image-style="original"/></figure><div class="feature_mini_blocks"> <p>Travel 20-30 miles per hour with waves 10-100 feet high.</p> </div></div> <div class="wp-block-fema-feature-mini feature_mini"><figure class="feature_mini__image" style="background-image:url('/sites/default/files/2022-03/icon_flood.png')"><img class="feature_mini__image_img" alt="feature_mini img" src="/sites/default/files/2022-03/icon_flood.png" data-entity-type="file" data-entity-uuid="d1e7ef59-05e3-469c-a929-c6e89185b054" data-image-style="original"/></figure><div class="feature_mini_blocks"> <p>Cause flooding and disrupt transportation, power, communications and the water supply.</p> </div></div> <div class="wp-block-fema-feature-mini feature_mini"><figure class="feature_mini__image" style="background-image:url('/sites/default/files/2022-03/icon_us-coast_3.png')"><img class="feature_mini__image_img" alt="feature_mini img" src="/sites/default/files/2022-03/icon_us-coast_3.png" data-entity-type="file" data-entity-uuid="01429ba0-44e1-48d5-afc8-5dc8b40b9669" data-image-style="original"/></figure><div class="feature_mini_blocks"> <p>Happen anywhere along U.S. coasts. Coasts that border the Pacific Ocean or Caribbean have the greatest risk.</p> </div></div> <p><strong>IF YOU ARE UNDER A TSUNAMI WARNING:</strong></p> <ul><li>If caused by an earthquake, <strong>Drop, Cover, then Hold On</strong> to protect yourself from the earthquake first.</li><li>Get to high ground as far inland as possible</li><li>Be alert to signs of a tsunami, such as a sudden rise or draining of ocean waters.</li><li>Listen to emergency information and alerts. Always follow the instructions from local emergency managers.</li><li>Evacuate: DO NOT wait! Leave as soon as you see any natural signs of a tsunami or receive an official tsunami warning.</li><li>If you are in a boat, go out to sea.</li></ul> <h2 id="prepare"><strong>Prepare NOW</strong></h2> <div class="wp-block-fema-checklist checklist_fema"><div class="checklist_fema__image--processed"><article class="contextual-region media media--type-graphic media--view-mode-default"> <div data-contextual-id="media:media=2024:changed=1646246965&langcode=en" data-contextual-token="y1tOsoCgJhB2WUmZPKAYZ2VfcipPtaQXsBgf2Gro-6I" data-drupal-ajax-container=""></div> <div class="layout layout--onecol"> <div class="layout__region layout__region--content"> <div class="field field--name-field-media-image field--type-image field--label-visually_hidden"> <div class="field__label visually-hidden">Image</div> <div class="field__item"> <img loading="lazy" src="/sites/default/files/styles/large/public/2022-03/featured_illustration_tsunami.png?itok=yzMfal71" width="480" height="395" alt="Illustration of a tsunami wave nearing a house. " class="image-style-large" /> </div> </div> </div> </div> </article> </div><div class="checklist_fema_blocks"> <ul><li>Learn the signs of a potential tsunami, such as an earthquake, a loud roar from the ocean, or unusual ocean behavior, such as a sudden rise or wall of water or sudden draining of water showing the ocean floor.</li><li>Know and practice community evacuation plans. Some at-risk communities have maps with evacuation zones and routes. Map out your routes from home, work and play. Pick shelters 100 feet or more above sea level, or at least one mile inland.</li><li>Create a family emergency communication plan that has an out-of-state contact. Plan where to meet if you get separated.</li><li>Sign up for your community’s warning system. The Emergency Alert System (EAS) and National Oceanic and Atmospheric Administration (NOAA) Weather Radio also provide emergency alerts.</li><li>Consider earthquake insurance and a flood insurance policy through the National Flood Insurance Program (NFIP). Standard homeowner’s insurance does not cover flood or earthquake damage.</li></ul> </div></div> <h2 id="during"><strong>Survive DURING</strong></h2> <div class="wp-block-fema-checklist checklist_fema"><div class="checklist_fema__image--processed"><article class="contextual-region media media--type-graphic media--view-mode-default"> <div data-contextual-id="media:media=2025:changed=1646247045&langcode=en" data-contextual-token="3VACPyTC0aaY1cXSdwuO2prmwEqqSoGDEim9PKw5E3A" data-drupal-ajax-container=""></div> <div class="layout layout--onecol"> <div class="layout__region layout__region--content"> <div class="field field--name-field-media-image field--type-image field--label-visually_hidden"> <div class="field__label visually-hidden">Image</div> <div class="field__item"> <img loading="lazy" src="/sites/default/files/styles/large/public/2022-03/illustration_earthquake_drop-cover-hold-on_0.png?itok=MYIjICA0" width="480" height="133" alt="Illustration of a person dropping to the ground, covering their head with their hands, and crawling under a table and holding on to it. " class="image-style-large" /> </div> </div> </div> </div> </article> </div><div class="checklist_fema_blocks"> <ul><li>If there is an earthquake and you are in a tsunami area, protect yourself from the earthquake first. Drop, Cover, and Hold On. Drop to your hands and knees. Cover your head and neck with your arms. Hold on to any sturdy furniture until the shaking stops. Crawl only if you can reach a better cover, but do not go through an area with more debris.</li><li>When the shaking stops, if there are natural signs or official warnings of a tsunami, move immediately to a safe place as high and as far inland as possible. Listen to the authorities, but do not wait for tsunami warnings and evacuation orders.</li><li>If you are outside of the tsunami hazard zone and receive a warning, stay where you are unless officials tell you otherwise.</li><li>Leave immediately if you are told to do so. Evacuation routes often are marked by a wave with an arrow in the direction of higher ground.</li><li>If you are in the water, then grab onto something that floats, such as a raft or tree trunk.</li><li>If you are in a boat, face the direction of the waves and head out to sea. If you are in a harbor, go inland.</li></ul> </div></div> <h2 id="after"><strong>Be Safe AFTER</strong></h2> <div class="wp-block-fema-checklist checklist_fema"><div class="checklist_fema__image--processed"><article class="contextual-region media media--type-graphic media--view-mode-default"> <div data-contextual-id="media:media=1564:changed=1623337116&langcode=en" data-contextual-token="l_s__FOGu62SNAZjYI1xpnRnQr-9PuJCi8EGQmaPp0I" data-drupal-ajax-container=""></div> <div class="layout layout--onecol"> <div class="layout__region layout__region--content"> <div class="field field--name-field-media-image field--type-image field--label-visually_hidden"> <div class="field__label visually-hidden">Image</div> <div class="field__item"> <img loading="lazy" src="/sites/default/files/styles/large/public/2021-04/text%20message.png?itok=qOFHKGlv" width="480" height="288" alt="Illustration of a hand holding a smart phone with text messages on it. " class="image-style-large" /> </div> </div> </div> </div> </article> </div><div class="checklist_fema_blocks"> <ul><li>Listen to local alerts and authorities for information on areas to avoid and shelter locations.</li><li>Save phone calls for emergencies. Phone systems often are down or busy after a disaster. Use text messages or social media to communicate with family and friends.</li><li>Avoid wading in floodwater, which can contain dangerous debris. Water may be deeper than it appears.</li><li>Be aware of the risk of electrocution. Underground or downed power lines can electrically charge water. Do not touch electrical equipment if it is wet or if you are standing in water.</li><li>Stay away from damaged buildings, roads and bridges.</li><li>If you become injured or sick and need medical attention, contact your healthcare provider and shelter in place, if possible. Call 9-1-1 if you are experiencing a medical emergency.</li><li>Document property damage with photographs. Conduct an inventory and contact your insurance company for assistance.</li></ul> </div></div> <h2 id="content">Related Content</h2> <ul><li><a href="https://www.ready.gov/collection/tsunami-safety">Tsunami Safety Graphics</a></li><li><a href="https://www.ready.gov/sites/default/files/2020-03/tsunami-information-sheet.pdf">Tsunami Information Sheet </a>(PDF)</li><li><a rel="noreferrer noopener" href="http://www.tsunami.gov/" target="_blank">NOAA Tsunami program</a></li><li><a href="http://www.redcross.org/prepare/disaster/tsunami">American Red Cross Tsunami Preparedness</a></li><li><a href="https://www.weather.gov/safety/tsunami">Tsunami Safety (weather.gov)</a></li></ul> <p></p> </div> </div> </div> </div> </article> </div> </div> <div class="updated"><p>Last Updated: 03/31/2025</p></div> <p> <a href="#">Return to top</a> </p> </div> </div> </div> </main> <footer class="usa-footer usa-footer--medium" role="contentinfo"> <div class="footer-top"> <div class="grid-container "> <div 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