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.
Though earthquakes and underwater landslides are usually the precursors to tsunamis, really anything that causes great movement or impact on the ocean floor can cause them (an asteroid impact, for example). Further, the first wave to hit home on land usually isn't the worst of them.. If you are on the beach or somewhere within a tsunami zone and feel an earthquake, do not wait for a warning. Immediately move away from the low lying area to a higher one. Keep in mind that if this occurs, you may have only minutes to move to higher ground.