Lumbering across the state, Tropical Storm Fay could dump up to 30 inches of rain in areas of eastern Florida as it turns northwest today, the National Hurricane Center said.
Hundreds of residents were flooded out of homes Wednesday as emergency crews used airboats to rescue people trapped in Brevard and St. Lucie counties.
Gov. Charlie Crist requested an emergency declaration from the president.
"I want to stress that this storm is turning into a serious catastrophic flooding event," the governor said during a news conference in Tallahassee.
The evidence was piling up in east central Florida:
• Fay, which hit the Keys on Monday before traversing northeast across the state, barely moved most of Wednesday. The hurricane center reported more than 22 inches of rain near Melbourne, just south of Cape Canaveral. The soaking is expected to continue as Fay brushes the Atlantic Ocean before turning back toward North Florida.
• Tom Christopher, St. Lucie County emergency management coordinator, said between 85 and 140 people had been rescued by boat or high-clearance vehicles. In some areas, it's waist-deep, said Erick Gill, a spokesman for St. Lucie County. "We've had reports of people having 3 to 5 feet of water in their home."
• The rising waters overwhelmed the sewer system in Brevard. Overflows affected between 40,000 to 50,000 residents living in areas just south of Melbourne Beach.
• The Florida National Guard mobilized about a dozen guardsmen and several high-water vehicles to help with evacuations and assist with damage assessment, said Jon Myatt, spokesman for the Florida Department of Military Affairs.
• Fay claimed 30 turtle nests on the 5-mile stretch of Boca Raton's beaches. In West Palm Beach, environmental officials hoped turtle nests were safe. Officials say the nests, which are buried under layers of sand, may still be there, but they won't know Fay's effect on them for days.
• Melbourne homeowners were warned about an alligator swimming down their streets after the storm's record-breaking rain continued on Wednesday, Orlando's local6.com reported. A Rockledge resident submitted a photo of a catfish in his yard.
Times staff writers Alex Leary, Craig Pittman and Mike Brassfield contributed to this report, which used information from the Orlando Sentinel and Times wires.