Two years ago Copenhagen was hit by torrential rain and thousands of cellars were flooded. The work to try to prevent that in the future has already been under way in many places and now the time has come to my neighborhood in Valby. For the next couple of years a 2.5m wide and 2.5km long tunnel will be dug from the lake Damhussøen under the park Vigerslevparken to the beach at Åmarken. When finished it should be able to transport a huge amount of rain water, when (not if) Copenhagen is hit by a new rain storm. As a bonus it also should improve water quality at the beach, so maybe it will be possible to dip your toes there in a not too long future.