Katrina was a Category 5 hurricane in the Gulf, but it was downgraded to Category 4 before making landfall Although the eye of the storm veered northeast, the counterclockwise winds pushed a 15-foot storm surge from Lake Pontchartrain into the city's drainage canal system. At the Industrial Canal, water overtopped the floodwalls, creating a "waterfall" effect that scoured the dirt foundations and caused the walls to collapse At the 17th Street and London Avenue canals, the soft, spongy Delta soil.
became saturated. The water pressure caused the oil to shift and slide, literally pushing the floodwalls and the ground they sat on into residential areas The existing "I-walls" were only designed for a Category 3 storm and had steel pilings driven only 20–25 feet deep, which proved insufficient to anchor them against the surge. New Orleans' massive pumps were immobilized when floodwaters inundated the non-waterproof electric motors, leaving the city "dead in the water" for weeks.
While the building was structurally sound, a design flaw in the roof's apex vents allowed wind to get under the rubber membrane, peeling it back like an onion and exposing 25,000 refugees to the elements. Trapped air pockets between the bridge girders created massive upward pressure, tossing 265-ton concrete segments into the lake
The video concludes by highlighting a "geological catch-22": New Orleans is sinking (subsiding) at a rate of up to half an inch per year because the levee system prevents the Mississippi River from depositing new silt to replenish the land. Experts suggest that without a "Great Wall of Louisiana" or massive coastal restoration, the city remains highly vulnerable to becoming a modern-day Atlantis.
became saturated. The water pressure caused the oil to shift and slide, literally pushing the floodwalls and the ground they sat on into residential areas The existing "I-walls" were only designed for a Category 3 storm and had steel pilings driven only 20–25 feet deep, which proved insufficient to anchor them against the surge. New Orleans' massive pumps were immobilized when floodwaters inundated the non-waterproof electric motors, leaving the city "dead in the water" for weeks.
While the building was structurally sound, a design flaw in the roof's apex vents allowed wind to get under the rubber membrane, peeling it back like an onion and exposing 25,000 refugees to the elements. Trapped air pockets between the bridge girders created massive upward pressure, tossing 265-ton concrete segments into the lake
The video concludes by highlighting a "geological catch-22": New Orleans is sinking (subsiding) at a rate of up to half an inch per year because the levee system prevents the Mississippi River from depositing new silt to replenish the land. Experts suggest that without a "Great Wall of Louisiana" or massive coastal restoration, the city remains highly vulnerable to becoming a modern-day Atlantis.
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