In the global fight over climate change, leaders of vulnerable low-lying island nations have long sought to draw attention to their plight. They have staged symbolic events like an underwater cabinet meeting, gone on hunger strikes and delivered anguished speeches to the United Nations. Those efforts have had little impact on the substance of the energy and economic policies that dictate governmental response to climate change.

In the meantime, Mr. Anej and millions like him cope with the fallout while stranded on disappearing shores.