What is the difference between a tsunami and a tidal wave? Who helps people affected by tsunamis? How can people prepare for tsunamis? Can tsunamis be predicted? Case studies of recent tsunamis, including the December 2004 Indian Ocean tsunami, are examined to answer these questions and more. Stunning photos and diagrams cover both the science behind tsunamis and their devastating effects on people and the environment. A timeline notes major tsunamis from the last century.