Huayco
A huaico or huayco (Spanish pronunciation: [ˈwajko], from the Quechua wayqu, meaning "depth, valley") is an Andean term for the mudslide and flash flood caused by torrential rains occurring high in the mountains, especially during the weather phenomenon known as El Niño. National forests such as the San Matías–San Carlos Protection Forest were created in Peru to protect vegetation, which reduces runoff, and prevent huaicos.