Underwater keyart scenes for client

All the scenes are taking place in the future in a post-apocalyptic world.
On the first picture you can see a few divers who are a rag tag group of poor scavengers who scour the sunken ruins of Manhattan for precious metals and supplies to trade.
Second picture shows the same group of divers swimming through the subway tunnel.
The third picture is a boat chase through the skyscrapers of a sunken New York City. In the background, there is a towering Sea Wall.