Andean alarm: climate crisis increases fears of glacial lake flood in Peru; In 1941, thousands of people died in Huaraz when the natural dam on a lake above the city gave way. Now, melting glaciers are raising the chances of it happening again * Photographs by Harriet Barber

Byline: Sam Meadows in Huaraz, Peru Lake Palcacocha is high in the Cordillera Blanca range of the Peruvian Andes, sitting above the city of Huaraz at an altitude of about [...]