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.
If the earthquake that causes the tsunami happens far out in the ocean away from the shore, there should be ample time for the authorities to issue a tsunami warning. If, however, the earthquake happens close to shore, there may only be minutes between the earthquake and the arrival of the first wave.hile it may be tempting to watch a tsunami from the coast, never, ever give into this temptation. Do not assume you can outrun the tsunami as many people cannot run faster than a tsunami can travel. It is also important that you do not assume that it is safe to return to shore after the first wave.