The powerful hurricane hit Louisiana on Aug. 29, 2005. It forced a storm surge that breached a system of levees built to protect New Orleans.
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The storm would go on to cause significant damage to the Gulf Coast from Texas to central Florida. It would ravage New Orleans while displacing countless residents.
RELATED: Will Ida be worse than Katrina?

Ida vs Katrina: How the two hurricanes compare as New Orleans braces for impact
More than 1,800 people in the region died and the storm caused billions in damages.
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The 16th anniversary of Hurricane Katrina's ruinous strike on the Gulf Coast comes as Hurricane Ida makes landfall in Louisiana.