Forecasters say Tropical Storm Fay could bring hurricane-force winds to the Florida Keys as soon as Monday, and the governor has already declared a state of emergency. Forecasts say winds could top 100 miles-per-hour. Governor Charlie Crist says the storm could turn into a major disaster and issued the emergency decree to help communities prepare. A spokeswoman for the Monroe County sheriff's office says there could be a mandatory evacuation for visitors on the Florida Keys as early as tomorrow morning. Flooding from Tropical Storm Fay has killed one person in Haiti and three in the neighboring Dominican Republic, where a woman and two children drowned when they tried to cross a swollen river in a car. Fay could become a hurricane tomorrow as it approaches central Cuba. Christopher Juckins of the National Hurricane Center says the official track would bring Fay off the west coast of Florida Tuesday and Wednesday. But he says the track is always uncertain, and the entire peninsula of Florida needs to pay attention. Juckins says if the storm veers to the east, it could pass over the Miami area early Tuesday.