A new report says that stronger levees being built after Hurricane Katrina are not enough and another breach could once again bring catastrophic flooding to New Orleans.

The report released on Friday by the National Academy of Engineering and the National Research Council says New Orleans could be made safer by elevating more homes and abandoning neighborhoods below sea level.

The report caps three years of investigations order after the horrible flooding left in the wake of Hurricane Katrina. It concludes that New Orleans residents should not be satisfied with the stronger levees now being built by the Army Corps of Engineers.

The corps says fortified levees would withstand "100-year" storms — those defined as moderately dangerous hurricanes with a 1-in-100 chance of hitting in any given year. The report contradicts that statement and proposes that said standard is inadequate for heavily populated areas.