As rising seas threaten to swallow the island nation of Tuvalu, Australia's "climate visa" aims to reach out to Tuvaluans, helping them make choices in the face of slow-moving disaster.

An aerial view of the port between the Pacific Ocean, top, and lagoon on November 27, 2019 in Funafuti, Tuvalu. The low-lying South Pacific island nation of about 11,000 people has been classified ...