From Accuweather:

Rita continues to strengthen at this hour and will soon be a hurricane. Over very warm water, the storm could become a Category 3 hurricane by the time it reaches the Keys later Tuesday. Key West is likely to experience the worst of the storm from late Tuesday into early Wednesday with winds gusting to 100 mph, and a relentless pounding from ocean waves. Heavy squalls of rain and wind are likely to reach as far north at South Florida. After passing the Keys, Rita will enter the central Gulf of Mexico during the middle of this week. A large expanse of 85-degree plus water assures that this storm will be very mean and very dangerous as it takes aim at the Texas coast.

Once Rita moves into the Gulf of Mexico it's going to intensify to at least Category 4 strength before making landfall by Friday or Saturday. AccuWeather's current projected path has landfall somewhere between Corpus Christie, Texas and Lake Charles, Louisiana