1. Heed tsunami warnings ‑ they mean a tsunami exists. Listen to radio or
television for information and follow the instructions of your local
Advance warning of tsunamis sometimes comes in the form of a noticeable rise or
fall in the normal depth of coastal water. This is nature's tsunami warning and
should be heeded.
If you feel an earthquake in a Pacific Coast area, turn on your battery‑powered
radio to learn if there is a tsunami warning.
A small tsunami at one beach can be a giant wave a few miles away. Do not let
the modest size of one wave allow you to forget how dangerous tsunamis are. The
next wave may be bigger.
Prepare ahead for possible evacuation. See the Evacuation and
Emergency Planning and Checklists page for information.