Flash Flood

"Flash Flood" is a disaster in the game.

Symptoms
Storm clouds will cover the sky and a few seconds after the popup message the water sorrounding the island will rise and consume the buildings and structures.

What to do
You will have to run towards the tallest and stablest structure on the island and climb up to the top. If it is a really tall tower, stand in about the middle and try to stay indoors to keep from falling off into the water. The water will rise to a certain level while drowning and destroyin the bottom of the building, making the building tilt, before stopping at the certain level.