Human-Caused Sea Level Rise Accounts for 80% of U.S. Coastal Flood Days
A new analysis by Climate Central, extending recent peer-reviewed research through 2025, reveals that human-caused sea level rise is responsible for approximately eight out of every ten days of coastal flooding across 71 U.S. locations. The frequency of coastal flooding has more than tripled since the 2000s, reaching an average of 14 days per year during 2020-2025 in these same locations. This increase is attributed to rising sea levels, which are a direct consequence of a warming climate. Oceans have absorbed 90% of the excess heat from heat-trapping pollution, leading to thermal expansion of seawater and melting glaciers and ice sheets. Wilmington, NC, for instance, experiences 108 days of coastal flooding annually, with about 76% of these days directly linked to human-caused sea level rise. The analysis highlights that even under low-emissions scenarios, sea levels will continue to rise, posing ongoing risks to coastal communities.
