First of all, the Andes are located on the edge of the ring of fire, or pacific plate. This makes many small earthquakes to occur, And even some small volcanic activity.
Second, the climate is not the same in all parts of the mountains, so some areas could be in the middle of a drought while another part could be in a frost.
Third, Gravity is always on the mountains, of course. But it sometimes causes landslides and avalanches.
I think that the Andes are a dangerous place for natural disasters to occur. If the government of Peru and society work together, maybe a way to stop the natural disasters will come up.