Disasters can lead to depression and other problems with health.  That information comes from Columbia University's National Center for Disaster Preparedness.   

In the latest report about mental health issues from the Associated Press,  they point out that "the aftermath of a disaster like the floods that submerged parts of Mississippi, flooding for Louisiana or the tornadoes that have wiped out towns in the Midwest and Southeast can leave victims with depression and other ailments."

Most of the people along the Mississippi River did have time to be able to evacuate, and the experts say that they may help over time as people work to digest the disaster.   

Thousands decide to evacuate in Louisiana because of the rising water, and since the lifting of some of the mandatory evacuations today, many people may be making the decision to go home.

Irwin Redlener, the director of Columbia University's National Center for Disaster Preparedness, says the extra lead time can help. It gives people time to safely leave with important documents and keepsakes, and allow them to eventually have a fresh start.