Natural climatic changes have induced sea level oscillations on geological-time frequencies. The present anthropogenic forcing however, is causing faster-than-ever changes as oceans warm, water expands, ice melts, and the sea level consequently rises. Therefore, the frequency of coastal floods increasingly affects highly populated coastal areas. Other consequences are longer droughts and stronger floods that alter the river sediment discharges and the impact on dense water formation, changing the continent-ocean mass exchanges. Sea level changes can also affect sea floor stability, generating geological hazards. Our goal is to study and quantify all these changes.