Tomas could produce up to 10 inches of rain and a storm surge of three feet above normal tide levels along its path, the National Hurricane Center said.

For Haiti, which is struggling to recover from the January earthquake and a cholera outbreak, that could be disastrous, as the country is vulnerable to flash flooding and mudslides.

On Sunday, Tomas was a Category 2 hurricane with top winds of 100 mph. It then deflated into a tropical storm. Earlier on Wednesday, Tomas was weakened by wind shear into a disorganized tropical depression.

Forecasters say they expect the system to steadily strengthen because it is moving into a more favorable environment and over warm waters.