It ain't over yet - Water Coming into New Orleans

Not over yet
Levees breeched
Water coming into the city

weather.com - Vulnerable Cities: New Orleans:

"A hurricane approaching the city from the east, virtually at the mouth of the Mississippi River, 'would drive the lake water southward into the city. So under the right circumstances, the flooding may be more severe coming from the lake than that coming from the Gulf (of Mexico),' said Jay Grimes, Louisiana State Climatologist.

Many see the threat of a surge from the Gulf of Mexico as minimal because there is a complex series of levees between New Orleans and the Gulf. Many of the levees have been built and improved since 1966, when construction on the Lake Pontchartrain and Vicinity Hurricane Protection Project began.

Now, the project is focusing on closing gaps in the levee system in outlying areas, as well as within city limits.

The levees that protect New Orleans from the lapping waves of Lake Pontchartrain have holes in them formed by three large canals that are used to pump water out of the city and into the lake on a daily basis."