Weird one
Mass flooding made it so that people had to live on pieces of floating broken wood from previous buildings and everyone was going insane from starving and fear. The animals in my dream had a war with each other about this as well and there was some "thing" killing people and animals alike as well as a virus that could infect everything that was alive. There were stacks of cages that seemed to rise beyond the sky or at least into straight blackness both upwards and inwards, there was no sky. My consciousness would jump from being to being until they died or until I needed to see different angles of the story. I realized I was dreaming for a few seconds when something in the cages(which were all interconnected via holes sawed into the bars to create a city but full of rot from death and shit) had grabbed me with it's teeth and was dragging me away to be eaten, I remember thinking it sounded like a mutated, demonic sort of pig and I was fighting as hard as I could to get away but knew it was a losing battle.
My consciousness would go into or just float around various areas or people/animals. These two cats who were in love were chained outside of a massive hotel/ convention center floating on the water that was a sort of sanctuary for people. They were chained in a way similar to how frogs get tied down for dissection but they were loved and fed and they wished they could go inside but if they were sick they could infect everyone. No animal was allowed inside. When it infected you, you would start behaving erratically and try to work with whatever was causing this all to happen, you'd try to push people or animals into the water, which was filled with ghoul like people who would try to drag you under the water, I would surf around with some invisible propulsion that allowed me to glide freely but I was still in danger of being grabbed or dragged if I showed down and was doing this all on a wood scrap. There were wars between groups of animals and people over carcasses and food found in floating storage containers or debris that could be valuable to survival. All of the junk was laid out in a near exact map of my childhood neighborhood and I only realized it after I woke up, but when I was running down the pieces of floating debris right before I was dragged off to the side into the cages, the area I was being dragged towards was where I used to cut through someone's yard to get to an old cemetery irl. Weird dream