with some atolls being uninhabitable by 2050. The coastal flood risk will rapidly increase during coming decades, possibly by 2-3 orders of magnitude by 2100 in the absence of effective adaptation and mitigation, with severe impacts on coast-dependent livelihoods and socioecological systems . Impacts reach far beyond C&S; for example damage to ports severely compromising global supply chains and maritime trade, with local-global geopolitical and economic ramifications. Global investment costs to accommodate port growth and adapt to SLR will amount to USD 223-768 billion before 2050, presenting opportunities for C&S by the sea to build climate resilience . Severely accelerated SLR resulting from rapid continental ice mass loss would bring impacts forward by decades, and adaptation would need to occur much faster and on a much greater scale than ever performed in the past  .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report