WELLINGTON, New Zealand — Residents of Fiji were beginning to clean up and assess the damage Sunday after a ferocious cyclone tore through the Pacific island chain overnight.

There were no immediate reports of fatalities, although aid workers said it would take at least a day to establish communications with some of the smaller islands that were directly in Cyclone Winston’s path. There were widespread reports of damage, with many homes and crops destroyed.

Authorities were urging people to remain indoors as they cleared fallen trees and power lines. They said all schools would be closed for a week to allow time for the cleanup.

On Saturday, the government imposed a nationwide curfew and declared a 30-day state of natural disaster, giving extra powers to police to arrest people without a warrant in the interest of public safety.

Wind speeds from Cyclone Winston were estimated at up to 177 miles per hour. The cyclone moved westward overnight along the northern coast of the main island, Viti Levu, before continuing out to sea.

Fiji’s capital, Suva, located in the southern part of the main island, was not directly in the cyclone’s path and avoided the worst of its destructive power.

“Truth be told, we’ve gotten off pretty lightly here in the capital,” said Alice Clements, a spokeswoman for the aid agency UNICEF who lies in Suva. “It was still a pretty awful night. You could hear crashing trees and power lines, and popping rivets as roofs got lifted and ripped out.”

She said there’s foliage everywhere which looks like it has been put through a blender.

Clements said there’s real concern for the welfare of people on the northern part of the main island and smaller islands elsewhere. She said many would have lost their homes and livelihoods.

She said the Fijian government is responding quickly.