Isaac has been downgraded to a tropical storm but not before it left a soggy mess across the U.S. Gulf Coast.
Nearly two feet of rain soaked the region and has caused widespread massive flooding.
North of New Orleans, 60,000 people were told to evacuate their homes when a dam threatened to burst.
Entire neighborhoods have been swallowed by rising flood waters.
One million households and businesses in Louisiana are without power and 150,000 residents are in the dark in Mississippi.
Families who lost everything in Louisiana are still being rescued by national guardsmen in boats.
"It just poured in more surge than anyone expected and it just so happened it came right on us," said Greg Knight, whose home was flooded.
Forecasters said the storm is now moving across Arkansas and Missouri today.
It is expected to die out over the weekend.