In the USA, many people are projected to be at risk of flooding from SLR  . A projected SLR of 0.9 m by 2100 could place 4.2 million people at risk of inundation in US coastal counties, whereas a 1.8-m SLR exposes 13.1 million people . In California, under an extreme 2-m SLR by 2100, 150 billion USD  of property or more than 6% of the state's GDP and 600,000 people could be affected by flooding . A 1-m SLR would inundate 42% of the Albemarle- Pamlico Peninsula in North Carolina and incur property losses of up to 14 billion USD  . In nine southeast US states, a 1-m SLR would result in the loss of more than13,000 recorded historical and archaeological sites with over 1000 eligible for inclusion in the National Register for Historic Places . This SLR raises groundwater levels by impeding drainage and enhancing runoff during rain events ; coastal flooding enhances saltwater intrusion affecting drinking water supply in settlements  .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report