This overburden starts to slide down the hill with the added weight and lubrication. Gaining speed, it grows into a catastrophic landslide that sweeps houses off their foundations and dumps them into the valley below. You are content now in your new surroundings and with your new role - encouraging new plant life to poke through the fresh topsoil. It's satisfying to finally be productive after having wreaked so much destruction in your journey around the world. As a drop of water, you accept that your environment is continuously changing.
Nothing remains constant.
Occasionally you flow over land, which also moves albeit at a much slower pace. While most of the earth's inhabitants don't build their nests and dens in dangerous areas, humans do. They've got to know that they're living on borrowed time. Maybe they think they'll get away with it, but sooner or later you know they will learn to live with the earth's spasms. Otherwise these natural events will continue to be natural disasters for them.