Former detainees refusing to leave the shut-down Manus Island centre spent the night in compounds without electricity.
Power was cut to most of the complex and running water to some compounds in the Australian-run centre in Papua New Guinea last night as it officially closed down.
Around 600 refugees are refusing to leave.
One of the detainees, Kurdish journalist Behrouz Boochani, said some kept watch in case of attacks and a large part of the centre had no access to electricity.
The refugees in Manus are going to sleep in fear, stress & hunger. Some of them awake to keep watch. We couldn't get enough rest this week.— Behrouz Boochani (@BehrouzBoochani) October 31, 2017
Refugees say they have rationed food supplies and drinking water.
They've been warned that arrangements will be made today for the centre to be returned to the PNG defence force who will evict them to buildings in the island's Lorengau town.
Staff disappeared at dawn yesterday before locals reportedly entered the centre - looting fans, tents and furniture.
Refugee Abdul Aziz Adam said the departure of Australian staff was negligent.
"Australia walked away ... and then this is what happened, the locals now ... they can come inside kill everyone do whatever they want."
He said the refugees were determined to stay.
Yesterday locals staged two separate protests over the refugees.
Under the banner of the Manus Alliance Against Human Rights Abuse, about 200 people marched 3km to the provincial government building.
The group's deputy chair Ben Wamoi presented a petition to the governor with a list of demands they want conveyed to Australia.
"We demand that Australia complete its obligations to sent the asylum seekers back to Australia and to process them there for final settlement to a third country of their choice."
Another group of locals reportedly protested against the refugees, calling for them not to be relocated from the detention centre into Lorengau town.