BATON ROUGE, La., Sept. 20 - Hurricane Rita gathered strength as it beat a path toward the west today, graduating to a category 2 hurricane after starting the day as a tropical storm. Now lashing out with 100 m.p.h. winds, the storm is expected to batter Florida's southern coast and the Keys and potentially pose a new threat to the weary Gulf Coast.
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The storm is expected to strengthen once it crosses into the Gulf of Mexico. Hurricanes draw strength from warm surface water, so it is not unusual for a relatively weak Atlantic storm to roar to life as it crosses the warmer Gulf, where water temperatures have been unusually high all summer, said Abby Sallenger of the United States Geological Survey. This happened just over three weeks ago, when Hurricane Katrina, then a Category 1 storm, cut through southern Florida and strengthened to a Category 5 in the gulf.
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http://www.nytimes.com/2005/09/20/national/nationalspecial/20cnd-rita.html?hp&ex=1127275200&en=acf359cd0c679e86&ei=5094&partner=homepage