Hurricane Isaac Hits New Orleans, Causing Severe Flooding

The Gulf Coast storm has landed with winds up to 80 mph.
3:00 | 08/29/12

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Transcript for Hurricane Isaac Hits New Orleans, Causing Severe Flooding
And hurricane isaac make a second landfall overnight. Sustained winds of 80 miles per hour. More than 500,000 people without power right now. Our extreme weather team is covering it all. And sam leads our coverage from the heart of the storm in new orleans. Good morning, sam. Good morning, robin. This is exactly what we were afraid of. Ass isaac was going to be a small category storm. But it was going to stay in place and pound people with wind and rain. Let's look at the satellite and radar on top of each other just to show you. The size of isaac's cloud path and also how the rain is wrapping around it. Earlier, we've seen the heavier storms to the south. Now, they're making a continual circle around this storm. The idea is that very heavy rain will continue, not just here, but travel on up through the We're basically looking at rains, tropical rains from this system, from the gulf all the way to the great lakes. It's a long path for isaac. But it seems like here, this storm will never leave. Isaac's triple-threat of relentless rain, whipping winds and crawling movement is pounding southeastern louisiana. Isaac first made landfall tuesday night at 6:45 central time near the mouth of the mississippi river, 75 miles from new orleans. Just before coverage of the republican national convention. Good evening, diane. We're above canal street in the heart of new orleans. And hurricane isaac made landfall in plaquemines parish. Hours of 80-mile-per-hour winds, taking down trees and damaging electrical lines. At least 400,000 are without power. This storm was not to have this wind and rain rotating around new orleans until about 1:00 in the morning. This is the worst new orleans has seen from this storm so far. Isaac's destructive slow crawl pushed it 90 miles west in 9 hours before making a second landfall, at port fourchon, louisiana. Isaac is barely stationary. And the 80-mile-per-hour winds continue to blow around it. It's beginning to just shred this area with damage. Signs and glass are going now all down canal street. In these pictures from space, isaac is seen inching its way along the coast, as slow as 8 miles per hour. The snail pace means that isaac can bring 20 inches of rain in some areas in the next 24 hours. And the winds mean more damage is expected in this category of storm.

This transcript has been automatically generated and may not be 100% accurate.

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