No, but the tower actually not being a tower but an island? But then it stopped raining and the water level kept declining so the people followed it, abandoning their homes "higher up" and taking their belongings with them further down and down and down once again until there was no water left even on the ground (which used to be the bottom of the ocean), so now the island remains as this huge mountain?
I haven't found all of the letters and murals yet but that's my interpretation after my first playthrough. Also I feel like it didn't just stop raining out of nowhere but because mankind probably stopped living in harmony with nature (and also forgot to play the large instruments which are linked to the whales and the magic they perform to make it rain?). Which is why the whales were stranded and waiting for a sign that mankind had changed. The sign being the protagonist making the huge climb to the top just to bring the little baby whale back to its kind and playing the instruments on the way. Which then triggered the whales to rise again and bring back the rain.
I have to go more meta on this game once I have replayed it.









