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A sinkhole swallowed Nicolas Cage’s driveway. Yours might be next.

How to save America’s coastal neighborhoods.

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 lesson earlier this month, when a furious high surf siphoned the ground beneath his Malibu, California, mansion, collapsing his driveway and front porch into a gigantic 30-foot-by-30-foot sinkhole. The cave-in ruptured a gas main, swallowed an access road, and forced dozens of locals to evacuate. In the process, it put into stark, cinematic relief the unyielding threat of coastal erosion in every community in the nation with a view of the sea.

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It’s impossible not to imagine Cage standing on the edge of that yawning pit as he might in one of his films, bombastic in his bafflement, every outsize gesture a pantomime of confusion. But no one should have been surprised. As far back as 1976, the California Coastal Commission denied a proposal to build a home on the lot where Cage’s Malibu home now teeters over the void, citing “concerns over wave hazards.” In 1986, the same commission rejected another residential proposal on the land, deeming it an “extremely hazardous area” threatened by waves and erosion.

So why, just a few years later, was a home built there anyway, one that would eventually come to be owned by a certain Hollywood eccentric? A few years after their initial rejections, the waterfront lot’s original owners were able to convince the commission that with enough clever engineering, including a sea wall and concrete stilts, the home, its septic system, driveway, and access road could be protected from the sea god’s wrath. But much like Odysseus before him, Cage has found the hard way that the lord of waves does not easily forget his due. “What is the Grail but Earth itself?” he once told the New York Times, characteristically mythologizing his real estate acquisitions. “The divine object is Earth.”

In this case, at least, Cage chose the wrong cup. But Cage is hardly alone in laying out his home atop the wrong stretch of sand. Nearly all of the nation’s coastal communities — from ritzy enclaves like Malibu to working-class quarters of the Rockaways in New York — rely on coastal engineering to remain inhabitable, dumping sand or erecting sea........

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