Swamped

You think about it hard. There's bound to be spills in regular use, and if it's just a little water, it shouldn't raise an alarm. So most likely, the water tends to flow somewhere - a drain, maybe? - and if that gets too full, an alarm goes off.

Well, there's a fair amount of water. But the lighting's not too good down here. Low priority for lightmoss, because so few people come this way. It's hard for you to track it.

Maybe if you had something more distinctive to follow...

Well, when it comes down to it, you don't really need socks. You slip your left shoe off, take the sock off, and put the shoe back on. Uncomfortable, but manageable. You toss your sock in the water, and use it to follow the flow.

Hmm. That weird buzzing seems to be getting a little bit louder. Maybe it's in the drain you're looking for.

You soon find the drain, and it's not hard to see the mechanism. You don't really have the means to get the grate off easily, though. Maybe there's some way you can trigger it without that...

The buzzing's getting quite loud now. And a little unnerving.

Well, if it's somehow dangerous, then it's probably best if you get the alarm going before it gets you. So you'd best think quick about how to do that.