Gentilly, New Orleans lying between the London Avenue Canal and Bayou St. John, fall outside of Gentilly, as do the Lakefront subdivisions of Lake Terrace and Lake Oaks, and the Lakefront campus of the University of New Orleans. Apart from the natural high ground along the Gentilly Ridge and the Lakefront section, itself raised above sea level on man-made land created by a project of the Orleans Levee Board in the early 20th century, Gentilly was badly damaged following Hurricane Katrina. The London Avenue Canal floodwalls were breached in two places by Katrina's storm surge, flooding most of the area. Gentilly's population has
Hurricane preparedness for New Orleans Hurricane Ivan's threat to the city resulted in the largest evacuation of the city to date. Mayor Ray Nagin issued a call for a voluntary evacuation of the city at 6 pm on September 13. An estimated 600,000 or more evacuated from Greater New Orleans. The contraflow plan was put into full effect for the first time, but rather late in the evacuation due to various confusions. This proved valuable practice, for the contraflow was implemented much more smoothly in 2005. Hurricane Pam was a hypothetical hurricane used as a disaster scenario to drive planning for a 13-parish area in