Hurricane Melissa threatens to make a direct strike on Jamaica as the most powerful storm in its history. See how strong it will become and where it’s headed.

Tropical Storm Melissa was moving slowly through the Caribbean Sea early Thursday, said forecasters warning of "life-threatening flooding," and landslides.

Tropical Storm Melissa is expected to bring days of heavy rain to the Dominican Republic, Haiti and Jamaica and may trigger life-threatening flash flooding, the National Hurricane Center says.