Residents of the Florida Keys exhaled after Hurricane Rita largely spared the island chain, while those in Texas and already-battered Louisiana fretted the strengthening storm could become a Katrina-esque monster and target them by week's end. Rita was upgraded to a Category 3 storm early Wednesday with 115 mph winds and forecasters said it could further intensify, sparking an order for mandatory evacuations in New Orleans and Galveston, Texas. Federal officials told Gulf Coast residents to begin bracing for a blockbuster storm. "Up and down the coastline, people are now preparing for what is anticipated to be another significant storm," President George W. Bush said. Acting FEMA Director R. David Paulison told reporters that the agency has aircraft and buses available to evacuate residents of areas the hurricane might hit. Rescue teams and truckloads of ice, water and prepared meals were being sent to Texas and Florida, The Associated Press reported. "I strongly urge Gulf coast residents to pay attention" to the storm, Paulison said. Stung by criticism of the government's slow initial response to Hurricane Katrina, President Bush signed an emergency declaration for Florida and spoke with Texas Gov. Rick Perry about planning for the storm's landfall.