My understanding is that it is built on a rise but I am not sure. I think it is above sea level. However, if the dikes keep water out, they will also keep water in due to rain so you have to consider the heights of the dikes also should that happen. This does not take into account that this mound that the dome is on will be battered by waves. But there is nothing we can do, they are committed to the plan they made. We just have to pray for them and hope they can stay calm inside and not panic.
Does anyone know what the breach elevation of the dikes happens to be?
I've seen a few reports throughout the day stating that the Superdome is 25 feet above sea level.