a catastrophe is an unexpected event that causes great suffering and damage.
2. To destroy something means to cause so much damage that it is completely ruined or does not exist anymore. destroy:destruction.
3. The tropics are the hottest parts of the world, near the equator. tropics:tropical.
4. When a gas or vapor condenses, it changes into a liquid. condense: condensution.
The formation of hurricane Katrina depended on a combination of a number of different Circumstances. Warm and humid air was moving upward into the sky from the warm ocean near the Bahamas. As more air rose and lower ocean air took its place, a cycle of continuously moving air was started. Condensation resulted in the creation of rain and more warming of the already warm air.
Thunderstorms were created high above and began to rotate around the center of the new storm. As the storm moved slowly into the waters of the warmer water of the Gulf of Mexico, it was energized even more. When its winds reached 73 kilometers per hour, Katrina could be called a tropical storm.
By the time Katrina hit the United States, it qualify as a Category 4 hurricane. The two places that were the most exposed to the powerful winds were the states of Louisiana and Mississippi. In those two states, destruction was widespread.