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.
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.
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More than 1,800 people in the region died and the storm caused billions in damages.
The 16th anniversary of Hurricane Katrina's ruinous strike on the Gulf Coast comes as Hurricane Ida makes landfall in Louisiana.