re: How fast would BR flood?

A lot of BR sits on high ground and there's a bluff that runs from downtown along Highland(ish). Anything south of that is screwed if the levee goes anywhere from around the Kidd south. North of that (north of that low spot that's between the Kidd and that tugboat dock), the elevation is high enough that there is only the chance of light flooding (water reaching up to the railroad or MAYBE a roadway).

Worst case scenario would be a breach along River Road at or south of LSU. All of that is floodplain. With so much water being held back right now, there would be tons of force pushing water through at a rate that would eat through the levee in short order.