DHYE, Nepal — High in the Himalayas, on a rugged plateau dotted with empty mud huts, an exodus has begun.

In the village of Dhye, crops are stubby, dead stalks. Water is scarce. The only school closed a few years ago. With dwindling food, most families have packed their belongings and left, driven out by a faceless, man-made enemy.

They are Nepal’s climate-change migrants, and there will be more.

“I love this village,” said Sonam Chhiring Gurung, 76, one of the final holdouts, “but I can’t survive here much longer.”

Climate change is remaking the Himalayan region, putting at risk millions of South Asians who depend on its water resources and pushing mountain dwellers in northern Nepal, home to the world’s highest peaks, to build new settlements at lower altitudes.