Germany's adaptation efforts still lagging five years after Ahr Valley flood desaster - expert

Five years after devastating floods destroyed parts of the Ahr Valley and adjacent regions in western Germany and neighbouring countries, experts warn that a similar event could cause another catastrophe if the country does not step up mititgation and adaptation efforts. Extreme rainfall caused rivers to swell into torrents that led to immense damage and killed almost 200 people in July 2021, marking one of the deadliest environmental disasters in Germany’s history. 

If another heavy rain event hit a region with geography similar to that of the Ahr Valley, of which there are 33 across Germany, the consequences would be “very similar” to what happened in 2021 regarding the extent of flooded areas, water engineering researcher Holger Schüttrumpf told newspaper Tagesspiegel. While Germany has improved early warning systems to deal with extreme weather, physical infrastructure and adaptation measures still fall short of preparing the country for events like the Ahr Valley flood, which are likely to occur more often due to global warming. 

“We haven’t come far enough with flood prevention infrastructure,” Schüttrumpf said. Especially retention reservoirs that can absorb excess precipitation are being built too slowly due to bureaucratic hurdles, he argued. “We have to be faster than the next flood when it comes to implementing protection measures,” the researcher from the RWTH Aachen University said, adding that such an event could happen again much sooner than many people currently believe. 

At a memorial ceremony in the Ahr Valley, chancellor Friedrich Merz said citizens had the right to expect protection against environmental disasters from the state, beyond immediate relief. The catastrophe in the valley influenced regulation and increased efforts by the federal government and the states to implement flood prevention and climate adaptation measures, Merz said. In his address, the chancellor only mentioned climate change once, despite it being the underlying cause for a climate event of such scale. “No person, no town, no region in our country must or should be left alone to face the fear of disasters and the forces of nature, or the fear of the consequences of climate change that we are experiencing,” he said. There was no mention of efforts to reduce climate-warming emissions.

According to a 2025 report by environmental NGO DUH, over 320,000 homes across the country could suffer damages from so-called “once-in-a-century” flood events, which are likely to happen more often than once every hundred years as a result of climate change. Germany has a national climate adaptation strategy and has set measurable targets to increase the country's resilience against the worst consequences of climate change. There are ongoing discussions on whether to introduce a mandatory insurance for homes located in flood-prone areas.