English: As a consequence of climate change and the ongoing rise of the global sea level, the arid coasts of North Africa are experiencing pronounced shoreline retreats and coastal flooding. Along the 4,633 km coastline that extends from the Gulf of Tunis to the Nile Delta, deltaic and sandy beaches exhibit some particularly interesting dynamics due to anthropogenic and climate change-related factors that increase their vulnerability to coastal hazards. According to a study recently published in the Scientific Reports journal, 47% of North African coasts have a high or very high vulnerability as a result of anthropogenic drivers such as damming and the rapid urban growth of the past decades, and not (only) global warming. The densely populated river deltas in Tunisia and Egypt are particularly vulnerable to coastal hazards, the environmental consequences of which affect crop yields and result in increased migrations from the affected regions. This image, acquired by one of the two Copernicus Sentinel-2 satellites on 20 January 2021, shows the northern side of the Medjerda River delta plain in Tunisia, which is one of the regions analysed in the newly published study. To better observe the shoreline retreat and the deterioration of the river’s coasts, the study authors used Sentinel-2 images captured in 2019 and compared them to aerial photographs and Landsat-5 imagery of the same region, taken in the 1970s. The Copernicus Sentinel-2 mission, which is composed of two twin satellites, Sentinel-2A and Sentinel-2B, allows users to monitor and study coastal zones and wetlands globally, with a maximal spatial resolution of 10 metres and an average revisit time of five days at the equator.