It is a well-known fact that our climate is changing rapidly. The global temperature has increased by 1oC over the last half century and 2016 was the warmest year since the beginning of global temperature measurements in 1880. This human-induced long-term temperature increase eventually results in a sea level rise. Remote Sensing is thé tool to help detect and monitor the effects of sea level rise at global scale. Earth Observation satellites have been collecting valuable observations since the early 1970s. By applying water detection algorithms to harmonised satellite datasets, we can retrieve useful information on the amount of submerged land in coastal areas.