Delta's path compounded damage already made by more powerful Hurricane Laura, which came ashore in the region in late August.
By noon on Saturday however, Delta had moved on to western MS where it weakened to a tropical depression with winds of less than 63km/h, the National Hurricane Center (NHC) said.
Delta made landfall Friday evening near the coastal town of Creole - only 15 miles (24 kilometres) or so from where Laura struck land in August, killing 27 people in Louisiana. "Delta is forecast to weaken to a tropical storm tonight and to a tropical depression on Saturday". He had gathered food, plenty of water and had covered his windows to protect against flying debris during Delta.
Delta made landfall Friday evening near the town of Creole, a few miles east of where Laura hit in August, and then moved directly over Lake Charles, a waterfront city where almost every home was already damaged.
It then moved directly over Lake Charles, a waterfront city about 30 miles (50 kilometres) inland where the earlier hurricane damaged almost every home and building, and where mouldy mattresses, sawed-up trees and other debris still lined the streets.
A man walks across a street as the outer bands of Hurricane Delta make landfall in Galveston, Texas. on October 9, 2020.
"The last one was the worst one, this one can not be worse", said Olmsted, who works for an electrical utility and lives with her boyfriend.
About 740,000 homes and businesses in the region were without power early Saturday, with almost a half-million of those affected in Louisiana.
"It's raining real hard; it's flooding; the wind is strong", Jack said.
Hurricane Delta bears down on storm-weary US Gulf Coast
Delta, the 25th named storm of an unprecedented Atlantic hurricane season, made the record books when it struck the Gulf Coast. We could see the chance for localized flooding in some spots, along with a chance of flash flooding on roadways.
He and a colleague planned to ride out the storm from inside a heavy vehicle equipped with a radar dish.
This week marked the sixth time of the current season that Louisiana has been threatened by tropical storms or hurricanes.
"Damaging winds and a life-threatening storm surge continue over portions of southern Louisiana", the Miami-based centre said, adding that one monitoring site was reporting a storm surge of 2.4 metres above ground.
By 7am (local time), Delta was centered near the Louisiana-Mississippi state line and barely a tropical storm.
And in Mississippi, Gov. Tate Reeves declared a state of emergency like his counterpart Edwards did in Louisiana. We could see the chance for localized flooding in some spots, along with a chance of flash flooding on roadways.
New Orleans, to the east, was expected to escape Delta's worst.
The Louisiana governor's office said it had no reports of deaths early Saturday, but a hurricane's wake can be treacherous.
Several flood alerts also remain in place, including flash flood warnings in north and central Louisiana, and a flash flood watch for parts of Texas, Louisiana, Arkansas, Mississippi and Tennessee as Delta is expected to bring torrential tropical rains to these areas through Saturday night.