And the heat will have damaged the stone, and the water damaged it more.
Hannibal cut his way through the Alps to get to Rome by lighting fires under rocks, getting them hot and then pouring water over them to split them apart.
Luckily, they are saved. That's the best thing to have happened. The artifacts are saved. The only things not are the central spire, the roof, and the flower-pattern stainless glass supposedly was also lost.