when a hurricane Katrina made landfall, city officials of New Orleans were most worried about what aspects of the hurricane due to New Orleans being built below sea level?

A tornadoes
b storm surge
c excessive rain
d high wind

City officials of New Orleans were most worried about the storm surge when Hurricane Katrina made landfall, due to New Orleans being built below sea level. A storm surge occurs when water is pushed toward the shore by the force of the winds swirling around a hurricane. The surge combines with the normal tides to create the hurricane storm tide, which can increase the water level by 15 feet or more. This posed a significant threat to the city since much of it was situated below sea level.