The landslide behind my neighbor’s backyard doesn’t exist—not according to the New York State landslide map or Greene County’s hazard-mitigation plan or the federal inventory managed by the U.S. Geological Survey. On a hot July day the seasonal stream that runs through this ravine, named the Shingle Kill, is small enough to step over. In the past, when the Shingle Kill occasionally raged, they could hear rocks colliding in the streambed. But the Shingle Kill landslide did change the mountainside that day. The Shingle Kill landslide wasn’t on my radar as a potential climate problem until a massive, ultraluxury resort and “branded residences” development was proposed for the hillside next to it.