>>3546504thanks, but we have it already;
it is called the Monsoons.
take Chennai for example:
a cyclone hits it every fall, without fail, flooding the streets and drowning thousands, cleansing the land of feces and Dravidians alike.
...or take uttarkhand: what do you think is the purpose of the regular inundations and landslides?
all these mechanisms are way ahead of our time, and just go to show the technological superiority of the world's greatest superpower.