The global governance of displaced and trapped populations, forced migration and refugees is not prepared for the numbers likely to manifest under climate change. The Group of Twenty has a responsibility to prepare, push for reform and initiate annual reviews to enhance humanitarian responses to aid climate mobility. International policy and law build on the false assumption that displaced people and refugees can return to their place of origin when conditions improve, conflicts subside or homes are rebuilt. This cannot hold for many of those affected by climate change. Governance reform is needed to strengthen rights and obligations of peoples and governments in countries of origin, transit and destination, recognizing the special circumstances and needs of “climate refugees” or migrants.