Anyone know if they can repair it before the city is totally flooded out?
It seems pretty likely that they cannot stop the flooding.
When the city is below sea level, and a storm like this breaks the levees, there isn't much you can do but let it flood. The water would be pouring in at too high a rate to stop with sandbagging.
They have to wait for things to settle down. Then they can repair the levees. And then they can begin the pumping.
Recovery will take a while.