President Bush flies over the Gulf Coast in Air Force One to survey the damage. He later announces a major federal mobilization to help the victims.
The entire region is declared a public health emergency amid fears of diseases that could spread because of the contaminated, stagnant water.
Evacuations from the Louisiana Superdome to the Houston Astrodome begin. About 20,000 people are expected to be transferred from New Orleans to Houston.
When asked about the number of dead, New Orleans Mayor Ray Nagin replies, "Minimum, hundreds. Most likely, thousands."