Hurricane Melissa was set to pummel Jamaica on Tuesday as a catastrophic Category 5 storm, the strongest to lash the island since recordkeeping began 174 years ago.

The storm was expected to make landfall early Tuesday and slice diagonally across the island, entering near St. Elizabeth parish in the south and exiting around St. Ann parish in the north, forecasters said.

Hours before the storm, the government said it had done all it could to prepare as it warned of catastrophic damage.

Landslides, fallen trees and numerous power outages were reported ahead of the storm, with officials in Jamaica cautioning that the cleanup and damage assessment would be slow.

A life-threatening storm surge of up to 13 feet (4 meters) is expected across southern Jamaica, with officials concerned about the impact on some hospitals along the coastline.

The storm already was blamed for seven deaths in the Caribbean, including three in Jamaica, three in Haiti and one in the Dominican Republic, where another person remains missing.

Melissa was centered about 150 miles (240 kilometers) southwest of Kingston and about 330 miles (530 kilometers) southwest of Guantánamo, Cuba.

The system had maximum sustained winds of 175 mph (280 kph) and was moving north-northeast at 2 mph (4 kph), according to the U.S. National Hurricane Center in Miami.

Melissa also was expected to make landfall in eastern Cuba late Tuesday as a powerful hurricane.

A hurricane warning was in effect for Granma, Santiago de Cuba, Guantánamo and Holguin provinces, while a tropical storm warning was in effect for Las Tunas.

Up to 20 inches (51 centimeters) of rain were forecast for parts of Cuba, along with a significant storm surge along the coast.

Cuban officials said Monday that they were evacuating more than 600,000 people from the region, including Santiago, the island’s second-largest city.

Melissa also has drenched the southern regions of Haiti and the Dominican Republic, with a tropical storm warning still in effect for Haiti.

The hurricane was forecast to turn northeast after Cuba and strike the southeast Bahamas by Wednesday evening.

A hurricane warning was in effect for the southeastern and central Bahamas, and a tropical storm warning was issued for the Turks and Caicos Islands.

AP video shot by: Matias Delacroix, Jordany Junior Verdieu