The United Nations warned Tuesday that millions of refugees and displaced people face a gruelling winter, with far less humanitarian aid available this year as the coldest months arrive in the northern hemisphere.

UNHCR, the UN refugee agency, has seen its funding from governments slashed and is trying to raise at least $35 million in public donations to help Syrian, Afghan and Ukrainian refugees through the winter.

"Families will have to endure freezing temperatures without things many of us take for granted: a proper roof, insulation, heating, blankets, warm clothes or medicine," UNHCR's external relations chief Dominique Hyde said in a statement.

Under President Donald Trump, the United States, traditionally the world's top donor, has slashed foreign aid.

Washington previously accou

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