You found a couple places that could work as shelter. There's an old box, not very durable, but it is portable. In the sewers, dangerous and smelly, but can get you anywhere you need to go. An abandoned building, that already appears to have a large group of cats living inside. And an dog house that was thrown on the side of the road. Durable, waterproof, but temporary.
-box
-sewers
-abandoned building
-dog house
-keep looking