Peru

Peru and its melting glaciers are an early test of adapting to climate change. It's not going well.

Peru and its melting glaciers are an early test of adapting to climate change. It's not going well.

 After a day of bright sunshine, a chunk of ice the size of a dump truck broke off the glacier on Mount Pucaranra a few weeks ago. It plunged into the lake below and kicked up a wave nine feet high.

Victor Morales, a small, catlike man with a tattered ski cap who is the lake's solitary watchman, scrambled up to a stone hut on the side of the mountain and got on the radio. The wave had damaged an emergency drainage system meant to reduce the volume of the lake. But to his great relief, the earthen dam holding back the water was intact.

"It wasn't a big avalanche," Morales said.

Lake Palcacocha is a mile long and 250 feet deep, and the effect of a large...

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