Seems you're a long way off from the cozy city center you've grown familiar with. This area has a completely different feel to it, and a way more dramatic sense of lighting.
Eyeing this big glowy valve instills you with awe... which is immediately quashed by a leaden understanding of what you're supposed to do.
Grab the KEY, undo the LOCK with your DESIGNATED ASPECT BUDDY, collect RESOURCES, drain the water.
Got it.