You may have heard a news about a sudden big water swept away everything that houses, families and pets. This is possibly happening in any countries. I have seen such a disaster on TV news besides my mom.
My mom heard why it happened from her mom (my grandma). The place where the sudden big water comes could be a new town it developed for business. The place was used to be a river (or ocean) before the housing, maybe. River unlikely changes the course even if it covered by soil for years and years.
"Carefully study about the place where you buy a house." my grandma said.
Water course may returns to the original form eventually. And humans need thoughtfulness if change the course of the river.
Thank you for coming tonight too. Tomorrow is Monday. つまんないね。Good night, x