If no one else said it....move your bed out of the way.
Water that color means insulation, and insulation on top of wet drywall means the whole ceiling's coming down and going to make a godawful mess. It's like a time bomb. Get everything you can out of that room, quick as you can. If that's not practical, get everything to one side away from the leak and cover in plastic sheets.
Source: still cleaning up from an incident like this 2 years ago where the dust and insulation got into every damn crevice of my stuff
There’s probably somebody up there dead in the bathtub.
Cut off the heat in your apartment and you can have shitcicles too.
Move your bed. That doesn't look like it will be fixed anytime soon.
I once was awoken in the middle of the night to a pounding on my door. It seems the upstairs unit had a water tank failure (I was on the second floor). My and my downstairs' neighbors had flooded laundry rooms and bathrooms. It led to big loud fans for a couple of days and not much sleep.
Flip your mattress on its side and get it out of the way, maybe put your shower curtain on the floor under the leak for if/when the soggy ceiling crumbles.
It'll save a lot of drying time if the room is carpeted.
Maybe your upstairs neighbor is housing a mutant fish man in her bath tub, which she’s fallen in love with, and they’ve filled the entire bathroom with water so they can dance and fuck while swimming freely around.
This happened to my sister and I in our last place, the room above us just had a baby and they started flushing baby wipes down the toilet and it backed up. Cue the water dripping through air vents and the lighting fixtures then my closet cieling.... our landlord didn't do anything but get the plumber and a bout a week later I was looking in my closet and the ceiling was BLACK. oh man we were pissed, even the couch I had in my room became moldy and we threw it out.