Mother natures natural balance, sad, but not much anyone can do to stop it..
All I can say was it would have been very scary, heard a story through work, one of the businesses we work for does surf holidays, turns out he had a few bases around the place over there, one of his guides saw the ocean drain out and drove for the hills, wave still hit them though, rolled the car over and he had to break the glass to get out, clung to a tree or something, very close call..