Even as Frances battered Florida, another hurricane formed Sunday in the central Atlantic and quickly strengthened with a potential for following a path similar to the one that Frances followed.

"You might want to be smart about whether you take down your shutters," Miami-Dade County Manager George Burgess said Sunday at a briefing on the aftermath of Frances.

Hurricane Ivan (search) had sustained winds of 135 mph, advancing quickly from a tropical storm to a Category 4 storm, the National Hurricane Center (search) said.

It was about 760 miles east-southeast of Barbados, too far away to tell with any certainty whether it would hit the continental United States, the hurricane center said.

However, the center's map projections suggested a path across the Antilles and Hispaniola, possibly reaching Cuba (search) about Friday.

Ivan was moving west-northwest at about 21 mph and was expected to continue that direction.

The hurricane was due to reach Barbados by Tuesday and could strengthen, drawing power from hundreds of square miles of warm water.

After being struck by the back-to-back hurricanes Charley and Frances, Floridians should monitor the storm, forecasters said.

Both Ivan and Frances formed as tropical storms near Cape Verde off the African coast, an area known as a breeding ground for storms that become big hurricanes.

"They tend to be stronger systems, just because they have such a great environment to grow in as they cross the Atlantic," said Eric Holweg, a meteorologist at the hurricane center.

Hurricane Charley hit Florida's southwest coast with 145 mph wind on Aug. 13 and crossed the state, killing 27 people and causing billions of dollars in damage. On Sunday, Hurricane Frances made landfall near Stuart with 105 mph wind.