This extensive Guide on How to Prepare your Business for a Tsunami is specific to Hawaii, but the points are well made and can be applied to any businesses in a tsunami vulnerable area.  It gets business owners to focus on what their primary risk is ahead of time so that they are clear on what the priorities are when, and if, the time comes.  As earthquakes are often phase one of tsunamis, anticipating falling debris and how to shut down gas, water and electricity to reduce risk of fire should be part of the disaster plan.  Having a well-rehearsed evacuation plan based upon how congested their location is can make all the difference.