KINGSTON, Jamaica — Rescuers and aid workers fanned out across Jamaica on Saturday to distribute food and water and reach communities still isolated four days after Hurricane Melissa hit the island.

Essential relief supplies are now rolling into hurricane-stricken St. Elizabeth and Westmoreland, most of which had been cut off by fallen concrete posts and trees strewn across roads.

But in some parts, people were forced to dip buckets into rivers, collecting the muddy water for everyday use, while others have been drinking coconut water and roasting breadfruit.

In Westmoreland, mangled metal sheets, splintered wooden frames of houses and fragments of furniture littered the coastline.

Social Security Minister Pearnel Charles Jr. was among several convoys of emergency responders en route to deliver ready-to-eat meals, water, tarpaulins, blankets, medicine and other essentials.

“The priority now is to get help to those who need it,” said Charles Jr. during a brief stop en route to Black River for the first time with long-awaited relief supplies. Prime Minister Andrew Holness had declared Black River ground zero and said the town will have to be rebuilt.

The Jamaica Defense Force set up a satellite disaster relief site at the Luana community center near Black River where care packages are being dispatched to hurricane-stricken residents.

Many have been without vital supplies since Tuesday and quickly converged around a JDF truck as word spread that relief supplies were being distributed in the sweltering afternoon sun.

“Everyone is homeless right now,” Rosemarie Gayle said. “Thank you, thank you. I can’t say thank you enough,” she said, as she accepted a package of rice, beans, sardines, powdered milk, cooking oil and other essentials.

Melissa has left devastation in its wake, snapping power lines and toppling buildings, disrupting food and water distribution and destroying crop fields.

Some people have been walking for miles in search of basic goods and to check on loved ones, as more than 60% of the island remained without power. Helicopters have been dropping food in cut-off communities.

“People are in shock and they’re waiting on relief,” said World Vision’s national director of domestic humanitarian and emergency affairs Mike Bassett, who traveled to the town of Santa Cruz in St. Elizabeth on Friday.

“The biggest needs are clean water, tarps for roof damage, canned proteins, hygiene and cleaning supplies,” he said.

On Saturday, the United Nations’ World Food Program received 2,000 boxes of emergency food assistance shipped from Barbados, to be distributed in shelters and in the most-affected communities in the St. Elizabeth area.

“They will help meet the needs of 6,000 people for one week,” said communications officer for WFP Alexis Masciarelli.

One of the strongest Atlantic hurricanes to make landfall, Melissa has been blamed for at least 19 deaths in Jamaica, and 31 in nearby Haiti.