Many people acted heroically in the aftermath of Hurricane Katrina. The Coast Guard, for instance, rescued some 34,000 people in New Orleans alone, and many ordinary citizens commandeered boats, offered food and shelter, and did whatever else they could to help their neighbors.
Tidal waves, or tides, are a predictable, com-mon occurrence along coastal communities, generated by forces beyond Earthâthe gravitational pull of the sun and moon. However, tsunamis are not predictable. They are often generated by earth-quakes, volcanic activity, and slope failure.idal waves, or tides, are a predictable, com-mon occurrence along coastal communities, generated by forces beyond Earthâthe gravitational pull of the sun and moon. However, tsunamis are not predictable. They are often generated by earth-quakes, volcanic activity, and slope failure.
A tsunami is a series of waves or surges most commonly caused by an earthquake beneath the sea floor. Tsunamis can cause great loss of life and property damage in coastal areas.Very large tsunamis can cause damage to coastal regions thousands of miles away from the earthquake that caused them.1  Beaches, lagoons, bays, estuaries, tidal flats and river mouths are the most dangerous places to be.ery large tsunamis can cause damage to coastal regions thousands of miles away from the earthquake that caused them. 1  Beaches, lagoons, bays, estuaries, tidal flats and river mouths are the most dangerous places to be.