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, and the first wave may not be the most dangerous. A tsunami wave train may come as surges five minutes to an hour apart. The cycle may be marked by repeated retreat and advance of the ocean.Some people did not know this on December 26. tsunami is a series of waves, and the first wave may not be the most dangerous. A tsunami wave train may come as surges five minutes to an hour apart. The cycle may be marked by repeated retreat and advance of the ocean.