English: The picturesque Maresme train line, the oldest in the country, runs along the coast of the Mediterranean Sea in Spain. Its location makes it particularly vulnerable to the effects of climate change, namely the process of coastal erosion. Last week, a storm surge eroded the foundations of the train line, causing the sea waves to sweep away a section of the tracks, forcing a temporary interruption of rail traffic. The local mayors are proposing to permanently move the Maresme train line away from the coast, a solution supported by the geologists at the Observatori del GeoRisc research institute. They argue that because of the effects of climate change, the sea level will rise and beaches will be further eroded, making the train line unsustainable in the long run. The damaged coastal area, between Pineda de Mar and Malgral de Mar, is visible in this image acquired by one of the Copernicus Sentinel-2 satellites on 2 April 2022. The Copernicus Marine Environment Monitoring Service (CMEMS) and the Copernicus Land Monitoring Service (CLMS) work closely together on a comprehensive coastal monitoring service to address the complex dynamics of coastal erosion, whereas the Copernicus Climate Change Service (C3S) supports adaptation and mitigation policies by providing consistent and authoritative information about climate change dynamics and consequences.