Tropical Storm Fay, which left at least 11 people dead as it passed through Florida, was downgraded late Saturday to a tropical depression.
"Fay weakens to a depression, but heavy rains and flooding could continue for several days," the Miami-based National Hurricane Center said in a statement.
Fay, which now swirled over the Florida Panhandle, earlier spawned tornadoes that ripped through seven counties in south Florida, destroying 10 homes and damaging 50 others, local emergency officials said.
Some 50,000 homes have been flooded, and the storm knocked out power for 100,000 people.
President George W. Bush declared an emergency in the waterlogged, wind-battered state on Thursday, opening the way for federal disaster assistance.