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.
There are various factors that determine how far inland a tsunami can go. Here is a list of factors involved: The terrain of the land and the height of the tsunami wave. If the land is mountainous the tsunami would probably not go very far; however, if it is lowland, it may wash inland for several kilometers.Another important factor in a tsunami is the volume of water displaced. It is not the height of a tsunami that gives it momentum over land, but the length.The angle at which the tsunami reaches land and the geographical shape of the coastline: A concave coastline will suffer more damage than a convex coastline that can deflect the water movement.t is not the height of a tsunami that gives it momentum over land, but the length. The angle at which the tsunami reaches land and the geographical shape of the coastline: A concave coastline will suffer more damage than a convex coastline that can deflect the water movement.