[John Jamieson]

3+9=12
3+12=15

???

[Diddle E. Squat]

Correct. But the water has already been up to the superdome, which is at or slightly above sea level. So if it is going to max at 3' above sea level, as recently announced, then it isn't going to rise much further. At 3' above sea level it shouldn't rise above most rooftops.