An earthquake's worst killer may come from the sea
Tsunamis are the so-called "tidal waves" generated by some earthquakes. A tsunami, however, is not a single wave, but a series of waves. When you hear a tsunami warning, you must assume a dangerous wave is on its way.

If you live along the coast, an earthquake in your area is a natural tsunami warning. Do not stay in low-lying coastal areas after a local earthquake. Do not return to such areas until local authorities tell you that the danger of a tsunami has passed.

Approaching tsunamis are sometimes heralded by a noticeable rise or fall of coastal water. Never go down to the beach to watch a tsunami. When you can see the wave, you are too close to escape it.