Ida’s landfall is forecast on the 16th anniversary of Hurricane Katrina striking Louisiana, and it could be even more intense than that historic storm. However, since Katrina, a $14.5 billion flood-protection system was constructed around New Orleans that is expected to be much more effective in keeping stormwaters from inundating the city. It is also probable the Ida’s center will not pass as close to the city as Katrina did, meaning storm surge could be less intense. Katrina was also an enormous storm, which allowed it to push more water ashore. Ida is somewhat more compact.