As the Gulf Coast recovers from Hurricane Gustav, Tropical Storm Hanna is already wreaking havoc in the Caribbean. Twenty-one people have died in Haiti, where thousands have been forced to scramble to rooftops to avoid rising floodwaters. More than 100 Haitians have died in the three storms over the past few weeks. The US National Hurricane Center says Hanna could regain hurricane strength and turn toward the east coast of Florida, Georgia or South Carolina in the coming days.