Authorities have ordered the removal of barges from the Danube River near the Paks nuclear power plant in Hungary. This action was taken after a newly discovered stone structure began to raise water levels, impacting navigation. The structure's origin and exact composition are currently unknown, but it is causing localized increases in the river’s depth. Lower Danube water levels had previously been a concern due to prolonged drought, hindering river traffic. Now, the raised levels pose a different challenge, specifically affecting the safe passage of barges. The removal of the vessels is a precautionary measure to prevent accidents and ensure the continued operation of the power plant, which relies on the river for cooling. Investigations are underway to fully assess the stone structure and mitigate potential future issues.