OK, back to the original question. Can Water damage ceramic tile, NO. Being I live in a flood area and I restore floors I have seen homes with 4' of water in them and the tile was fine. Then again I have seen homes with 2" of water in them and seen tile come loose. You have an option then. If your tile are loose then you can use Inject a Floor and reattach the tile with out damaging the grout. IF the gout is coming loose and cracking then you have other problems that need to be looked at. f this is on a pier and beam, or a wood subfloor it all needs to come out.