The party eventually makes it through. The Venture Captain is an adept swimmer, and with her re-breather goes and helps those caught up in tough currents. The passage twists and turns, but finally an air pocket opens up. There is a ladder leading up it, which everyone climbs to get out.
This building is inside the dome, which you can see through a great crack in the roof. The building was a water filtration plant, one shaped like an L around the equipment; the machines in the crook of the L sit lifeless, a result of the city being overrun by droids who care nothing for the living inhabitants still living there.
Going to peek around the L, you see that the front of the building is likewise broken open, and a quartet of battle droids is marching by on patrol out front.
Adara motions you to hold back a moment, and prepare yourselves.
Here we are. Now, we need to get ready to move from location to location. One foul up and all the droids in the city will know we're here: remember, they're all connected by a central control computer, a hive mind that organizes them and transmits orders for where they should go. If one of them spots us, we have less than a minute to destroy it before it tells the computer what it's seen.
I can take you to the Shield Generator, the Ion Canon, and the Prison where your clone troops are being held. Which one do you want to go to first?