Hurricane Helene live updates: 600 people still unaccounted for in hard-hit county

After dumping more than 30 inches of rain on North Carolina and producing the biggest local flood in recorded history, the remnants of Helene are forecast to move on Monday into the mid-Atlantic.

As southeastern United States worked to clean up from Helene, some of its remnants are moving into Mid-Atlantic today with heavy rain forecast for West Virginia, Virginia and Maryland.

There is an elevated flood threat on Monday in Virginia and West Virginia, where the already saturated ground could get additional 1 to 2 inches of rain, which could produce flash flooding.

-ABC News' Max Golembo

Vice President Kamala Harris intends to communities impacted by Hurricane Helene "as soon as it is possible without disrupting emergency response operations," according to a White House official.

Harris, who was briefed by FEMA on the federal response to the hurricane, reached out to Florida Gov. Ron DeSantis and Georgia Gov. Brian Kemp.

At a rally in Las Vegas on Sunday, Harris addressed those who were impacted by the hurricane by sending her "thoughts and prayers" and thanking first responders.

"I know that everyone here sends their thoughts and prayers for folks who have been so devastated in Florida, in Georgia, the Carolinas and other impacted states. And we know that so many have been impacted. Some have died, but I want to thank everyone for doing everything you can to think about them," Harris said. "Send them your thoughts and your prayers. I want to thank the first responders who have done so much. I stand with these communities for as long as it takes to make sure that they are able to recover and rebuild."

-ABC News' Gabriella Abdul-Hakim, Fritz Farrow and Will McDuffie

Florida Gov. Ron DeSantis shared a major update on power restoration progress in the state on Sunday.

DeSantis said a post on X that most customers who lost power after Hurricane Helene made landfall in Florida's Big Bend area last week, have had their electricity restored.

The governor said power was back for 2.3 million customers, and 99% of the state has power.

He added that power remains out for 111,000 customers.

President Joe Biden spent his Sunday evening receiving briefings on the damage from Hurricane Helene, and speaking to local officials from the impacted areas.

In a statement, the White House said Biden intends to travel to the impacted areas this week, "as soon as it will not disrupt emergency operations."

Additionally, Biden spoke by phone Sunday with Georgia Gov. Brian Kemp, North Carolina Gov. Roy Cooper, Valdosta, Georgia, Mayor Scott Matheson and Taylor County, Florida, emergency management director John Louk, according to the White House.

The president also reached out to additional officials across North Carolina, Tennessee, Florida and South Carolina.

"In each conversation, the President received updates on response and recovery efforts, and he shared how the Biden-Administration will continue providing support to impacted communities – for as long as it takes," the White House said in the statement.

-ABC News' Sarah Kolinovsky