Context: The United Nations General Assembly adopted the UN Declaration on Sea-Level Rise by consensus on 24 September 2026 during its 81st session in New York.
Key Elements of the Declaration:
- Statehood and Maritime Zones: Affirms a presumption in favor of continued statehood and sovereignty for island nations, meaning they do not automatically lose their UN membership or legal status if their physical territory becomes submerged. It also supports the stability of established maritime zones and Exclusive Economic Zones (EEZs) under UNCLOS.
- Core Pillars: Organizes action around four main areas:
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- Knowledge, data, and science (improving observation systems and early-warning networks).
- Adaptation, finance, and resilience (expanding accessible climate finance and protective coastal infrastructure like mangroves and coral reefs).
- Livelihoods and cultural heritage (protecting displaced communities and preserving heritage).
- Legal dimensions (safeguarding human rights and maritime/statehood continuity).
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- Scale of the Threat: Addresses accelerating ocean warming and ice sheet melt. Global mean sea-level rise reached a record high annual increase of 5.9 mm in 2024, with rates jumping from 2.1 mm per year (1993–2002) to 4.7 mm per year (2015–2024). Approximately 770 million to 900 million people live in low-lying coastal zones worldwide.