Natural Tsunami Warning Signs In addition to tsunami alert messages issued by warning centres and national authorities, tsunamis may be accompanied by natural warning signs and recognizing any of these signs could save your life! FEELBig local earthquakes can cause tsunamisFEEL the ground shaking severely or for a long time? SEE SEE an unusual disappearance of water, or an oncoming wall of water? Tsunamis may be preceded by a rapid fall in sea level which exposes reefs, rocks, and fishes on the bottom of the sea as the ocean recedesTsunamis often come ashore as a wall of water, and quickly flood inland.SEE an unusual disappearance of water, or an oncoming wall of water? HEARAbnormal ocean activity, a wall of water, and approaching tsunami create a loud "roaring" sound similar to that of a train or jet aircraftHEAR the roar? RUNDon’t wait for official evacuation orders as there may not be enough timeImmediately leave low-lying coastal areasMove inland to higher groundRUN if you see a tsunami coming! Source: CDEMA, 2010