New Orleans was lashed with heavy rain and wind on the seventh anniversary of Hurricane Katrina as Isaac brought heavy flooding to rural Louisiana. Katrina was among the five deadliest and most destructive in history.

Formed over the Bahamas, Katrina turned west, gathering strength over the warm waters of the Gulf of Mexico.

When it slammed into the cities and towns of the Gulf coast, it left a path of death and destruction in its wake that buried entire parishes  of New Orleans and left Mississippi, Alabama and Louisiana changed forever. More than 1,800 people died; thousands...