Climate change is of great importance for urban water management today as both the water infrastructure itself as well as other large urban infrastructure has very long planning horizons. In Copenhagen the sea level is expected to rise and the variations are expected to increase in a changed climate and rainfall extremes are expected to increase as well. Along with very drastic protection levels of Subsurface infrastructure this makes the estimates of the extreme water levels that the Metro is to withstand very uncertain. Further, it is uncertain to exactly what degree the city itself will be protected and when this protection will be build.