They didn't use the word "breach" properly either. But nice try.
The details:
"Slosh models (computer models that predict storm surge) tell us that with a slow-moving Category 3, the levees get over-topped," Fontenot said. "And it gets worse from there."
Every damn article on this, including this one and the one that is linked to it, talks about storm surge. Damage would be greatest with a slow-moving hurricane that would have a surge lasting more than a short time. When the surge stopped, so would the flooding.