You don't suppose that next, California will be tryin' to get the gubmit to build them one of those dang levee thingees like NO wants???
Buncha geeks did some research along the CA coast, checking the erosion and deposits, etc.
They found out that for the last hundred years or, while all the construction was going on, well, it's been about the tamest period for the CA coastline in the last thousand years.
Anytime you see cliffs like that, well, it used to be flatter. Some of it fell away.
That's why they're cliffs.
That would be one tall levee