Another one from the questions-nobody-ever-bothered-to-ask-because-they-were-just-too-mind-boggling deparment:
In case you were ever wondering the volume contained within the city limits of New Orleans that is below sea level, the answer is about 250 billion gallons.
All 250 billion of those pesky gallons have now been relocated to more appropriate areas, like Lake Ponchartrain and the Gulf of Mexico, at least two weeks ahead of the most optimistic estimates.