Both Bioshock and Bioshock 2 take place in a city that's built on the bottom of the ocean. In both games there is at least one audio diary pointing out the extreme danger of water leaking into the city from outside. However, by the time you arrive in Rapture the structural integrity of the city is long-since compromised and water is leaking in all over the place. There are waterfalls, drips, and puddles everywhere.
After nearly a decade of this (by the time of Bioshock 2), how is the city not flooded and collapsed under the weight of the water? When a Big Sister cracks open a window near the start of Bioshock 2 it takes only a few seconds for the entire building to be flooded.
Are there any indications in-game, or in any other related material, that explains how the city is being maintained and kept intact after the massive amount of destruction that has occurred?