Also, I'm discovering some *fun* side effects of the syndrome, which usually manifests as a fever before moving onto the more exciting symptoms. I've been having dwarves suddenly die of thirst out of nowhere, in my holding cells, who had apparently fallen unconscious while walking over a cage trap, and just now one of my better soldiers got a fatal case of 'large, serrated spinning discitis' to the brain, since KO'd dwarves set off traps.
To top it off, my brook is drained since a Forgotten Beast decided to smash the floodgates I put in as an emergency drain, which were right next to where the brook starts on the map edge so I have no idea how to fix that (can't build pumps that close to the map edge), so this is how I discovered my hospital wells weren't cutting it on their own, since even with burrowing a full medical staff just to hospital and what I thought were water sources (If I don't keep them burrowed there everyone in the hospital dies of thirst), the main brook water sources were dry, and the backups in the hospital were "Bucket full" as mentioned before. So I'm losing more people to that first Forgotten beast than anything else, even years later. Almost hoping this my first fort will go Mad Max soon so I can build a new one
Regarding the water purge, I have so many items in the fort, which is huge, that to set up a purging system and run it, then use the fort without any of the items it had (they would get washed away, right?) just seems way too big an investment and would be simpler to build a new fort from scratch.
Honestly, would like to fight some FBs but now my policy is "No contact under any circumstances" since it carries the risk of crippling all productivity in my fort for the rest of the game, which is a bit too steep a price. If only FB extract had a timer of say, 1 year before it fades on it's own...