Interactive map
The path of Isaac
Projected path | Rainfall totals | Isaac's slow path | Storm surge protection | Isaac and Katrina
Color paths show the slow movement of the storm as it crossed the New Orleans region.
The Army Corps of Engineers' $14.5-billion, 133-mile storm protection system has upgraded the entire region's defense against flood waters. Among the components:
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Plaquemines Parish
Floodwaters reach 14 feet near overtopped levee; officials consider breaching a levee to lower water levels; evacuations ordered for bottom two-thirds of parish.
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Slidell
Flooding in old town area forces evacuations; rising water overwhelms pumping stations; businesses and homes inundated by up to 3 feet of water.
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New Orleans
Four bridge sections on the Lake Pontchartrain Causeway collapse; three-quarters of the city without electricity; street flooding and uprooted trees block roads.
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Tangipahoa Dam
Water released to prevent collapse of Tangipahoa Dam; officials order evacuations for 60,000 people along Tangipahoa River.
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Old levee I walls
Water from Katrina's surge put pressure
on the floodwalls and the soil beneath them.
Some eventually gave way, causing the walls to fail.
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New levee T walls
The new T-shape concrete wall has strong
strut support in the soil and resists toppling above ground.
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New flood gates
The new gates are designed to a 100-year-flood
standard and work in conjunction with the floodwalls
and pump stations throughout the region.
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