Dead mangrove stumps are seen in the water near the eroding shoreline of Cat Island in Barataria Bay in Plaquemines Parish, LA (AP Photo/Gerald Herbert)

The heavily eroded shoreline of Cat Island in Barataria Bay in Plaquemines Parish, LA (AP Photo/Gerald Herbert)

The last remnant of of formerly small island near Cat Island is seen as it is eroded by the surf in Barataria Bay in Plaquemines Parish, LA. (AP Photo/Gerald Herbert)