As it made its way up the eastern Louisiana coastline , most communities in Plaquemines , St. Bernard Parish , and Slidell in St. Tammany Parish were severely damaged by storm surge and the strong winds of the eyewall , which also grazed eastern New Orleans , causing in excess of $ 1 billion worth of damage to the city ( see Effect of Hurricane Katrina on New Orleans ) .
As it made its way up the eastern Louisiana coastline , most communities in Plaquemines , St. Bernard Parish , and Slidell in St. Tammany Parish were severely damaged by storm surge and the strong winds of the eyewall , which also swipped over eastern New Orleans , creating $ 1 billion worth of damage to the city from intense flooding and wind damage .