Early in the morning on Dec. 13, 1941, the citizens of Huaraz, Peru, heard a terrifying rumble echo across the valley. Within minutes, a torrent of water, ice and rocks had poured over the city, destroying a third of it and killing at least 2,000 people.
Click here for original story, How scientists are using drones to lower the risk of catastrophic flooding from large glacial lakes
Source: Phys.org