sentences:  The city was struggling economically and in the wake of Hurricane Katrina, 134,344 of 188,251 occupied housing units sustained reportable damage, and 105,155 of them were severely damaged.Because of historical settlement patterns formed by racial restrictions in the first half of the 20th century, African Americans were disproportionately impacted by the destruction.Responding to Hurricane Katrina, New Orleans Mayor C. Ray Nagin formed the Bring New Orleans Back Commission in September 2005.