London (CNN) Freezing temperatures and heavy snowfall are making life even harder for thousands of refugees living in limbo across Europe.

The cold snap gripping Europe has left dozens of people dead, including refugees in Bulgaria, according to Agence France-Presse.

Snow blanketed the Moria refugee camp on the Greek island of Lesbos, home to more than 4,000 people, on Friday. Roland Schönbauer, a spokesman for the UN Refugee Agency (UNHCR), told CNN Monday that the organization was transferring some 120 vulnerable men, women and children, including people still living in tents, to hotels following the storm.

A migrant receives food during snowfall at the Moria camp on Lesbos, on January 9, 2017.

The situation in Moria is fluid, and the spokesman did not have an estimate for the number of people still living in tents. Volunteers say thousands of refugees are still living in outdoor tents in the camp, despite statements by Greece's minister for migration, Yiannis Mouzalas, indicating otherwise.

"There are no refugees or migrants living in the cold anymore," Mouzalas told journalists at a news conference Thursday. According to local reports , Mouzalas suggested that there were only a handful of tents left in Vayiohori, near Thessaloniki, and Athens.

A Lesbos resident and volunteer, Philippa Kempson, shared video with CNN showing the shocking conditions at Moria camp, where some tents appeared to have collapsed underneath the weight of the snow.

"I'm amazed no one is dead yet," she said. Kempson and her husband Eric have been helping with relief efforts on the island since the refugee crisis escalated two summers ago. They said that this is the worst winter they have experience on Lesbos for 15 years.

An asylum seeker walks next to snow-covered tents at the Moria refugee camp.

Ella Carlquist, founder and chair of the humanitarian organization United Rescue Aid, also known as United Rescues, told CNN that she has seen a few cases of hypothermia at Moria camp, where many people don't have proper winter clothes.

"The weather has been bad for quite a long time now. People think that Greece is eternal summer and beaches. It's not like that," Carlquist said.

Lia Gogou, a researcher working with Amnesty International who was in Moria in early December, said that even people sleeping in containers aren't able to keep warm. Amnesty International is campaigning for asylum seekers to be transferred from the Greek islands to the mainland.

A child plays in the snow at the Kara Tepe camp on the island of Lesbos following heavy snowfalls.

"Asylum-seekers on the Greek islands face overcrowding, freezing temperatures, lack of hot water, violence and hate-motivated attacks," Iverna McGowan, director of Amnesty International's European Institution's Office, said in a statement . "While we have long called for reception conditions to improve, forcing refugees to stay on the islands only so that they can be returned to Turkey, in line with Turkey's interpretation of the deal, is inhumane."

UN warns of temperature drop

UNHCR spokesman Adrian Edwards made a similar plea at a briefing Friday, one day before the arctic blast slammed Europe.

"The UN Refugee Agency is today reiterating its call to accelerate the moving of asylum seekers from the Aegean islands to the Greek mainland," Edwards said at the Palais des Nations in Geneva. "The need for better protection will become all the more acute this weekend when temperatures on the islands are expected to drop. We are worried."

A girl holds a snowman at the Kara Tepe camp on the Greek island of Lesbos following heavy snow.

According to UNHCR, as of January 4, only about 7,800 people have been relocated or scheduled to relocate under the EU Relocation Mechanism -- around 12% of the 66,400 places agreed last year.

Transfers of asylum seekers to the mainland are only allowed after people have completed the registration process, which has been delayed by a number of factors, including a shortage of spaces on the mainland.

"It's completely inhumane. People are getting stuck here for a year. How do you expect people to survive?" Carlquist said. "What we have here is not even a refugee situation anymore... it is thousands of homeless people with no future."

A migrant stands next to a snow-covered tent at the Moria refugee camp, Lesbos.

UNHCR hailed a €25 million contribution from the EU aid department, known as Echo, in a video shared to Facebook in late November. In the footage, Liene Veide, a UNHCR spokeswoman, highlighted how a portion of these funds were being used to help refugees prepare for winter. Since April, Echo has given UNHCR €14 million in funds specifically for winterization measures, which include things like improvements to shelter infrastructure, new residential containers, thermal blankets and winter jackets.

Aspasia Kakari, a communications manager at Médecins Sans Frontières (MSF or Doctors Without Borders), told CNN that, given these funds, the dire conditions at camps like Moria were completely avoidable.

"If it gets any worse, we will start to see completely preventable deaths," Kakari said.

Asylum seekers across Europe face deadly cold

Refugees elsewhere in Europe are not faring much better amid plummeting temperatures.

German federal police said that they discovered 19 asylum seekers -- including five children -- suffering from hypothermia after they were abandoned at a highway stop in Bavaria in -4°F (-20°C) weather on Sunday. Their driver had abandoned the truck, leaving the group in an unheated cargo area for hours.

Asylum seekers light fires to keep warm at an abandoned warehouse in Belgrade.

In Bulgaria, border police said two men from Iraq and a Somali woman were found in the mountains near Turkey last week, having died from cold.

A 20-year-old Afghan man died from complications on January 3 after crossing the Evros River at night in below freezing temperatures, according to UNHCR.

As many as 2,000 asylum seekers sheltering in an abandoned warehouse in Belgrade are facing extreme cold temperatures. Aid workers in the Serbian capital say that the refugees are lighting fires in the warehouse in order to keep warm, and many have fallen ill.

"It's amazing how people are still surviving in these conditions," Todor Gardos, an Amnesty International researcher told CNN.