Risks from sea level rise for coastal ecosystems and people are very likely to increase tenfold well before 2100 without adaptation and mitigation action as agreed by Parties to the Paris Agreement . Sea level rise under emission scenarios that do not limit warming to 1.5°C will increase the risk of coastal erosion and submergence of coastal land , loss of coastal habitat and ecosystems  and worsen salinisation of groundwater , compromising coastal ecosystems and livelihoods . Under SSP1-2.6, most coral reefs , mangroves  and salt marshes  will be unable to keep up with sea level rise by 2050, with ecological impacts escalating rapidly beyond 2050, especially for scenarios coupling high emissions with aggressive coastal development . Resultant decreases in natural shoreline protection will place increasing numbers of people at risk . The ability to adapt to current coastal impacts, cope with future coastal risks and prevent further acceleration of sea level rise beyond 2050 depends on immediate implementation of mitigation and adaptation actions . 
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report