So... the power outage on Saturday horked the biomes to shit. I even got a nice newly generated chunk RIGHT in the middle of my giant underground city type ball a whacker thing.
Anyway, the good news is that I recovered the seed from backup.
The bad news is, shit that froze will remain frozen/snow covered until it's manually corrected.
You can pour water on snow to kill it, and both snow and ice can be melted with torches, jack ass lanterns, and GSBs.
It's also a great opportunity to mine ice blocks as you clear the shit, just remember to only mine iceblocks from single-depth water squares if you don't want to fix the water. The ice block acts as source water, so when it is removed, it will be like removing a surface water square.
You CAN use this to your advantage if you want to drain a seabed dry.
Just remember this only works if you MINE the iceblocks, as simply breaking them turns them into source water squares.
(You can break ice blocks in the nether to create water)