A boat floats in the lagoon near Bikeman islet, located off South Tarawa in the central Pacific island nation of Kiribati May 25, 2013.
David Gray / Reuters

A new kind of refugee crisis is on the horizon. For this one, there will be no tyrants to blame and the migrants won’t be escaping war. They will be fleeing nature—specifically the ocean—and they will have no home to return to. The highest point in the Pacific state of Tuvalu is just over 15 feet above sea level. During tidal surges, all of Tuvalu becomes temporarily submerged. The highest point in the Maldives, a country situated on coral atolls in the Indian Ocean, is less than eight feet above sea level. The tide on the islands creeps higher by the day. Scientists expect Tuvalu to disappear in the next 50 years, the Maldives in the next 30. Once they become uninhabitable, neighboring islands will follow, affecting up to 9.2 million people throughout the Pacific Ocean’s 22 island states and 345,000 in the Maldives. Although the slow advance of the waves may

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