Survivors of Monday’s earthquake in Turkey and Syria could face “a secondary disaster” as cold and snow lead to “worsening and horrific conditions,” the World Health Organisation (WHO) said Thursday.

Speaking at a press conference in Geneva, WHO incident response manager Robert Holden warned there were “a lot of people” surviving “out in the open, in worsening and horrific conditions.”

“We’ve got major disruptions to basic water supplies, we’ve got major disruption to fuel, electricity supplies, communication supplies, the basics of life,” Holden said.

The top humanitarian aid agency in the US government has pledged $85m (£70m) in urgent life-saving relief for earthquake victims in Turkey and Syria.

The US Agency for International Development (USAID) funding will go towards shelter, cold weather supplies, food, water and healthcare.

The moves comes as countries around the world send search crews and aid to the region, where over 20,000 have died.

Rescuers say supplies are needed now or more people will die from the cold.

U.S. Military officials said Tuesday that the United States European Command has begun sending aid to Turkey and Syria after two massive earthquakes rocked both nations within the past 24 hours, killing thousands of people.

“Using a whole of government approach, we remain in close contact with our Turkish Ally to determine what assistance is needed to help those affected by the disaster,” Marine Lt. Col. Garron J. Garn said in a statement to Military Times.

Fire struck again Wednesday night in Greece’s notoriously overcrowded refugee camp on the island of Lesbos, a day after a blaze swept through it and left thousands in need of emergency shelter. The fires caused no injuries, but they renewed criticism of Europe’s migration policy.

Wednesday night’s fires broke out inside the parts of Moria camp that had not burned in the first blaze, sending people streaming from the camp with their belongings, according to an Associated Press photographer in the area.

President Donald Trump called Syrian refugees a “great Trojan horse” during the 2016 campaign, but his administration has resettled them in a quicker pace than President Barack Obama did.

German Chancellor Angela Merkel stressed her commitment to refugees during a press conference held after her meeting with President Donald Trump, who has actively fought to keep Syrian refugees out of the U.S. He totally dodged the topic in his response.

“Immigration has to be worked on, but this has to be done by looking at refugees as well,” she said.

How the candidates in the 2016 presidential election fall on the issue.

As presidential contenders Hillary Clinton and Donald Trump debated last week, Syria was a sideshow. Clinton mentioned the country in passing; Trump ignored it altogether.

While they sparred over responsibility for the Islamic State, neither candidate mentioned Aleppo, a city of 2 million people reduced to rubble and under siege. At least — unlike Libertarian candidate Gary Johnson — they knew what Aleppo was. President Obama hotly rebuffs those who say his hesitancy to enforce redlines or support a no-fly zone made the Syria conflict worse.

The U.N.'s refugee agency reports that the number of displaced people is at its highest ever -- surpassing even post-World War II numbers, when the world was struggling to come to terms with the most devastating event in history.

The total at the end of 2015 reached 65.3 million -- or one out of every 113 people on Earth, according to the United Nations High Commissioner for Refugees (UNHCR). The number represents a 5.8 million increase on the year before.

Hungarians who voted Sunday overwhelmingly favored Prime Minister Viktor Orbán's policy to reject the EU plan to distribute refugees fairly across the bloc. Not enough voted to validate the result, but that may not indicate a public change of heart on immigration.