Unlike the core of the city, the waterlogged ruined buildings are a labyrinth of concrete, rebar and water, however this place is also very much inhabited.
During the reconstruction effort, a formidable amount of material (mostly n-crete, a modern, programmable concrete mixture using nanites to form properly) was used to stabilize and reconstruct old buildings as well as construct numerous platforms and pathways, allowing resettlement.
This was partially so that the docks would have ample storage space, partly to take advantage of the now available real estate right next to the docks that were suddenly seeing a very large volume of passengers and workers on a daily basis.
Areas closer to Atlantic Boulevard and the docks are a mix of self sufficient communes, shop areas, pubs/restaurants, hostels and small shops. The closer you go to the docks, the thicker the population is, having repurposed large parts of the abandoned buildings, or flat out constructed on new artificial ground constructed for the docks on the open waters.
For basic needs, the communes are mostly self sufficent. Between a large collection of solar panels, tidal turbines, small diesel generators and even a few powerlines to some areas, the whole region has power. Household water purifiers provide enough potable water for drinking, while waste is mostly converted to gas, which is then used for cooking in combination with electric stoves.