>>47014742Just lure any of the scattered sapplings that got lost in their way to the rooftop. They aren't too nutritious, but they mostly contain water for their constant crying.
As for food, you can try looking for rrats or KFPs hiding around, but there aren't any you could try boiling mould from the P-C block, however, do this as last resort.
Good luck, and god speed Anon