Here is a video tour through Chalmette. About three quarters of the way through, you can see St. Mark's church standing in about five feet of water. You can also see the St. Mark's rectory at the intersection of Missouri Street and Charles Drive. It was shot from a boat and was shown on WBRZ in Baton Rouge.
Below are some pictures of St. Bernard Parish after Katrina. Some of these images are very wide.
Please scroll to the right to see the after pictures.

This map shows the area affected by the Murphy oil spill, according to the St, Bernard parish web site. This is the same area from satellite.
Judge Perez Drive

Volpe Drive Before and After

Charles Drive Before and After

Charles Drive Before and After (Closeup)

Chalmette Circle Before and After

Chalmette Circle Before and After (Closeup)

Judge Perez Drive