Theo was watching the way the water rose and the places where it was gurgling and frothing like it was fighting to drain away. The main drain in the floor was putting up a fight, but the sinks didn't appear to be chuckling.
He wondered if some kind of diagnostic spell would work, but the first one he cast just told him what he already knew - 'this place is wet'. "Yes, I know that." he told it softly, unamused.
"We may drown in here." he said to Harry, like he was just talking about the weather as opposed to impending death. "Assuming the water isn't leaking out into the corridor." It was slightly hard to tell.