Swamped

They're called orchard beetles, because that's where they're usually found. They love to eat sweet fruits.

Thing is, if they don't get enough sugar, they get desperate and eat any sort of plant they can find. Which is bad for the long-term structural integrity of most buildings - plenty of wood in most of them, after all - but the Guild doesn't usually play the long game when it comes to dealing with their enemies.

No, the thing that makes them dangerous is that wood is very bad for them. Something in their tiny beetle stomachs can't handle it, and somehow that starts a fire.

Not a huge fire by itself. But it can get pretty big if there are enough of them. And you're definitely seeing a lot of them, scrambling around frantically. Like they do when they're starving.

And a latrine has a lot of unpleasant gases which are also flammable.

But after some more thought, you don't think this makes much sense. This hospital is mostly made of brick and stone. The nearest wood is in the beds, which are several feet away - too far to ignite any gas, except perhaps if a patient is having an excess of it. And it's a large space - it wouldn't be that hard to contain a fire, if it were noticed quickly.

Are the beetles just a coincidence, then? Or is something else going on?