Long before Hurricane Katrina, most experts knew the city of New Orleans was vulnerable. Situated up to 3.7 meters (12 feet) below sea level, between a lake and a river, and on the hurricane-prone Gulf Coast, the city was arguably a disaster waiting to happen. This video segment adapted from NOVA scienceNOW describes the threat Hurricane Ivan posed just one year before Katrina — an ominous foreshadowing of one of the country's worst natural disasters.
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