US defence expert warns people fleeing low-lying Pacific islands a precursor to ‘climate-exacerbated water insecurities’ that could trigger wider conflict

King tides crash through the sea wall, flooding Pita Meanke’s family property on the low-lying South Pacific island of Kiribati.
A king tide crashes through the sea wall, flooding Pita Meanke’s family home on the low-lying South Pacific island of Kiribati. Photograph: jeremy Sutton-Hibbert/Alamy