About 150 steps from John Imperato's Southern California home, pavement gives way to an ever-shrinking stretch of soft sand.
Imperato lives in Del Mar, a small, affluent town just north of San Diego. He spent his life savings to live here. He wanted to raise his son like he grew up, withing walking distance of the sea.
Del Mar is a picturesque place; its name means "of the sea," in Spanish.
That's becoming increasingly true.