What hasn't been said is that they may NOT be able to repair the levee break, and it's also likely that miles of levess adjacent tot he break may be "loosened" and water is seeping under them...the force of the water rushing to the breech is scouring the bottom nearby..the whole structure is weakened..
WWL reporting the water is rising in Metarie, the bowl of Lake Ponch may be larger than the lake...