When we went to the end room with Takahashi-san, we saw that the south end room (the one we're currently using) was hot and humid.

The power was only off since one stormy day so it can't explain this.

It seems that every now and then the air conditioning system stop in both end rooms.

Seeing the damages in the west end room it could be useful to go from time to time to check if the air conditioning is on in both end rooms.