Except in Shep Smith's bathtub. Then, all bets are off.
http://www.freerepublic.com/focus/f-news/1474026/posts?page=35#35
Shep Smith: "The water level in New Orleans keeps rising, and nobody knows why."
Alberta's Child: "What is he, a freakin' moron? The water level keeps rising because the elevation of New Orleans is lower than the elevation of the adjacent waterways. Maybe Shep ought to go home and try to fill the north half of his bathtub to get an understanding of some very rudimentary principles of fluid mechanics."
They also shut off the pumps, didn't they?
Alternative routes to San Antonio I just heard on Channel 2 Houston:
Get on I-37 North to San Antonio
1093 to Eagle Lake to 90W to Seguin
God bless and good luck to everyone leaving today. We are staying put since we are farther north.