There are 22 drainage pumping stations in NO. They cost millions of $ to build. Bringing in portable pumps will not help the major problems. At full capacity the NO pumping stations can pump over 1 billion gallons of water per hour. This will not solve the entire problem however as the pumping will increase the level of Lake Ponchartrain also. Eventually Lake Ponchartrain will return to a more normal, pre-storm level and the water will flow again to the lake via the canals in NO.
CNN just showed the opening of the gate at the Astrodome property and the first refugees arriving.
We have the technology to make LP drain much faster.