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.
Whatever the initial cause, the displacement of the water is what makes a tsunami. The Pacific âRing of Fireâ is the most common place for tsunamis to happen, due to the number of volcanic eruptions and earthquakes. The waves of a tsunami are not the same as normal waves, which are formed by the wind. Wind waves flow in a circular fashion, the tops of the waves curling back under themselves.