The global rate of sea-level rise from 1940 to 2000 was faster than all previous 60-year intervals over the past 2,000 years.
Among the most exposed cultural sites are the iconic ruins of Tipasa in Algeria and Saloum Delta in Senegal and Kunta Kinteh in Gambia.
Many major metropolitan areas on the East Coast are going to be increasingly at risk.
By the middle of the century much of the delta will have sunk below sea level unless the trend is reversed, scientists say.
Meltwater runoff in Greenland has risen by 21% over the past four decades.
Coastal cities across the globe are dealing with land subsidence even as the sea is rising. It may have contributed to Miami's tragedy.