CHATHAM — Lots of creatures and vessels now use the April Fool’s Cut to travel between the Atlantic and Nantucket Sound through an ever-widening breach in the barrier beach torn open by a nor’easter back on April 1, 2017. But it’s most regular visitor, the tidal waters of the open Atlantic, has proven to be the most devastating, assaulting the properties along the inner shore behind the barrier beach on high tides and storms. The intrusion of the ocean into the once-calm backwaters that connect to Stage Harbor and Nantucket Sound raised tides by a foot or more, exposing that coastline to open ocean wave and tidal energy.