There is a great deal of information on the U.S. Government's General services Administration's Hurricane Katrina Recovery page
(http://www.firstgov.gov/Citizen/Topics/PublicSafety/Hurricane_Katrina_Recovery.shtml)

It has links to:
Disaster Assistance for Victims
State Disaster Information (Alabama, Florida, Louisiana, and Mississippi)
Agencies Accepting Donations for Victims
and additional disaster resources

You can find additional information on Hurricane Katrina in
the Office of Citizen Service's FAQ database (http://answers.firstgov.gov/)

For practical tips on preparing for emergency situations,
refer to the Citizen Guide to Disaster Preparedness,
(http://www.pueblo.gsa.gov/cic_text/family/citizenguide/citizenguide.htm)
produced by the Office of Citizen Services with information
prvided by the Federal Emergency Management Agency.
For the immediate future, information will also be
available 24/7 in English and Spanish by calling
1 (800) FED-INFO.