Oh snap. Ooooh snap.
This fortress was
flourishing. 125+ citizens, a squad of ten Axe Lords, a self-sustaining industry... And candy.
Let's talk about candy. I had just discovered the magma sea, and was ready to mine it, when a dwarf entered a strange mood.
"Bones, cloth, rough gems, cut gems and bars of metal!", he demanded. And those I provided. However, due to a bug, and I'm sure it's a bug since I did all that was in my power, he didn't want to grab the cut gems and cloth. And so time passed, and I eventually forgot about him, reassured that my Axe Lords would know what to do when the time came.
I couldn't be more wrong. He went berserk, and the
first thing he did was destroy one door. And not a mere door, mind you, but the door that separated the stairwell from the water source which, you guess it, was directly connected to a river. Due to a human error, I had placed the floodgate just before the well's reservoir, and didn't even think about the flimsy wooden separée that separated my fort from a catastrophic demise.
My military squad is set to train near the third layer of caverns, to prevent any curious wildlife from accessing the main stairwell.
Said stairwell is now filled with 7/7 water, blocking my legendary Axedwarves inside. Luckily they have rations in their backpacks, but even those are starting to run short. But I've got to look at thing
positively: now half of my fort feels relieved! That's a burden off my shoulders.
So what am I to do? The water is spilling in the cavern layer, and the uppermost layer of my fort looks safe for now. In the worst case scenario, I can floor the main stairwell and forget about it, while preparing a rescue mission for my precious militia. But this wouldn't stop the water from filling the caverns, and I'm not too happy about that.
Thus, before admitting defeat, I am trying one last thing: digging a tile-wide staircase from the surface to the magma sea, and redirecting the water pipe into it. If things go well, I might be able to drain the stairwell and build a wall where the original door stood. I don't know the effects of spilling a river into the abyss below, but it sounds !FUN! and doable. I'll keep you updated.
EDIT: I did it!
But I am also an idiot. I'll blame the fact that I've been playing DF all night, so I'm tired. Here's the thing: instead of channeling the water pipe, to drain the water away from it,
I CHANNELED THE RIVER AGAIN! Luckily this reduced the water pressure by just the required amount for my dwarves to complete the bridge. Whew! In the meanwhile I have also sent a rescue team for my militia.
So now I have a river that's about to flood the magma sea. This is going to be fun.
EDIT2: Oh. The game is smarter than me. One single obsidian wall was formed, and that's it. Oh well, at least I didn't lose the fortress!