The rate of global mean SLR was 1.35 mm yr-1  during 1901-1990, faster than during any century in at least 3000 years  . Global mean SLR has accelerated to 3.25 mm yr-1  during 1993-2018 . Extreme sea levels have increased consistently across most regions . The largest observed changes in coastal ecosystems are being caused by the concurrence of human activities, waves, current-induced sediment transport and extreme storm events  . Early impacts of accelerating SLR detected at sheltered or subsiding coasts include chronic flooding at high tides, wetland salinisation and ecosystem transitions, increased erosion and coastal flood damage . The exposure of many coastal populations and ecosystems to SLR is high: economic development is disproportionately concentrated in and around coastal cities and settlements  .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report