Hurricane Melissa has strengthened into a major Category 3 hurricane, unleashing torrential rain and threatening to cause catastrophic flooding in the northern Caribbean, including Haiti and Jamaica.

Hurricane Melissa is on track to rapidly strenghten and could become a major Category 5 hurricane, according to the NHC, Saturday, Oct. 25.

Melissa has already proven to be deadly. Haiti's civil protection agency says three people have already been killed in the country, per the New York Times. Two deaths were the result of a landslide in Port-au-Prince, while the third was caused by a falling tree on the country's south coast in the town of Marigot.