Hmm never thought about that ( for urban preppers)

[NorthernRaider]

I'm trying to find an article but i think I lot it, twas about a family living in top floor apartment, they had already set up greenhouses on the roof and each block has a huge water tank as well. Due to the layout of the blocks they could and did string HD aluminium ladders from roof top to roof top with rope providing a hand rail and somewhere to fast safety harness. IIRC they had five rood tops to play with, and dad bought two or three rolled up escape ladders to allow them to get down in a hurry if needed.