Well, that's pretty terrifying, if so, since it sounds as if the mayor just unleashed 15k+ people to the dry parts of town "for whatever relief they can find."
"This is a desperate SOS," the mayor said. ... The plea from Mayor Ray Nagin came even as National Guardsmen poured in to help restore order and put a stop to the looting, carjackings and gunfire that have gripped New Orleans in the days since Hurricane Katrina plunged much of the city under water.
About 15,000 to 20,000 people who had taken shelter at the convention center to await buses were growing angry and restless in what appeared to be a potentially explosive situation. In hopes of defusing it, the mayor gave them permission to march across a bridge to the city's unflooded west bank for whatever relief they can find.
In a statement to CNN, he said: "This is a desperate SOS. Right now we are out of resources at the convention center and don't anticipate enough buses. We need buses. Currently the convention center is unsanitary and unsafe and we're running our of supplies."