If we want our beach towns to survive, we may need to wheel them further upshore. | David Swanson/AFP via Getty Images There is a kind of terror-tinged embarrassment that comes from dozing off on your beach towel on the sand, only to find a rising tide intrude upon your mid-nap bliss, lapping at your toes and sweeping away your sunglasses. It is a truth I relearn every June, one that arrives like the season’s first sunburn: The ocean is inevitable, and Poseidon always reclaims his own. Actor Nicolas Cage learned a far more serious — or more expensive, certainly — version of that lesso...