Helene is slamming Florida, Georgia and the Carolinas with torrential rain.
Helene -- which weakened to a tropical storm on Friday morning over Georgia -- made landfall as a massive Category 4 hurricane, slamming into the Big Bend region of Florida on Thursday night with 140 mph winds.
The monster storm churned across Florida into Georgia, leaving at least three people dead and millions without power across the Southeast. Significant flooding was reported across the region, with more rain expected Friday as Helene moves toward Tennessee.
More than 2 million customers are waking up without power across the South Friday morning in the wake of Hurricane Helene.
More than 1.2 million customers are without power in Florida and over 800,000 are in the dark in Georgia.
More than 500,000 lost power in South Carolina and more than 190,000 are without power in North Carolina.
About 200 people have been rescued overnight from the rising floodwaters in Pasco County, Florida, just north of Tampa, according to the Pasco Sheriff’s Office.
The water is receding Friday morning and rescue calls have slowed, authorities said.
The Atlanta Fire Rescue Department said it rescued more than 25 people using rafts in a flooded area in the north of the city.
Around 11 people were rescued at the Peachtree Park Apartments building where a creek is overflowing. Rescuers arrived there at around 1:30 a.m.
Some residents were transported out of the area by bus, while others refused to leave. Those evacuated are being taken to shelters.
-ABC News' Faith Abubey
Hurricane Helene was downgraded to a tropical storm around 100 miles southeast of Atlanta early on Friday, as its sustained wind speed slowed to 70 mph.
Life-threatening winds, flash flooding, rain and storm surge are ongoing through Florida, Georgia, North Carolina and South Carolina.
Helene is expected to slow and weaken as it travels north-northwest through Georgia toward the Tennessee-North Carolina border, the National Hurricane Center said.
Helene is projected to turn post-tropical on Friday afternoon or Friday night, the NHC said.
"However, the fast forward speed will allow strong, damaging winds, especially in gusts, to penetrate well inland across the southeastern United States, including over the higher terrain of the southern Appalachians," the NHC said.
-ABC News' Max Golembo
