Erosion has marched right up to the concrete footings of the multimillion-dollar home where it overlooks the bay. Massive sliding doors that used to open onto a wide deck, complete with hot tub, are now barricaded by thin wooden slats that prevent anyone from stepping through and falling 25 feet to the beach below.

The waters of Cape Cod Bay are coming for the big brown house perched on the edge of a sandy bluff high above the beach. It's

The waters of Cape Cod Bay are coming for the big brown house perched on the edge of a sandy bluff high above the beach.