Haha yes, sorry, "outdoor recreation" I took for an REI equivalent. Anyway, as Daylight can't get in to the tech shop but hears all this going on, he will call out to the shopkeepers and ask if they know where the pump or valve or some way to turn off the flow of the water is. Fjord, meanwhile, can easily go and actually get to wherever that is - he's fast in water and can breathe in it with no trouble (and can enable other people to do so with his water breathing spell, again, if this is a multiple person job to turn it off and if it is itself underwater at this point).

The others (excluding Rosinante who is still stuck on the stairs, chilling with a cigarette) will look for the tech shop key, expecting that the janitor's room probably has a copy.