MIAMI -- Hurricane Irma laid waste to beautiful Caribbean islands and caused historic destruction across Florida. The cleanup will take weeks; recovery will take months. Some islanders just want out. And after a huge exodus from the Florida peninsula, southbound traffic remains heavy with evacuees returning to uncertain situations, many without power or water in sweltering heat and humidity.

By the numbers

  • People still without electricity: 6.8 million - about a third of Florida's population - and hundreds of thousands in Georgia, with utilities saying it could take 10 days or more before all have power.
  • People still in shelters in Florida: 13,000.
  • Money raised by Tuesday night's star-studded "Hand in Hand" telethon for Hurricane Harvey and Irma victims: $44 million. Potential cost of damage to privately insured property in U.S. and the Caribbean: $55 billion.

The death toll

The confirmed death toll from Hurricane Irma stood at 69 Thursday morning. With the electrocution of a utility worker in the British Virgin Islands, at least 38 people were killed across the Caribbean. In the U.S., 31 deaths were reported in Florida, Georgia and South Carolina. Also, police are conducting a criminal investigation into the deaths of eight residents of a nursing home in Hollywood, Florida, that lost power in the storm. The owner has been accused of health care fraud. As in other disasters, Irma poses particular risks to the elderly.

CBS News correspondent Jonathan Vigliotti reports that the nursing home was right across the street from a hospital that had working air conditioning. Hollywood Police Chief Tom Sanchez said investigators believe the deaths were heat-related.

"They were utilizing portable AC units, which were insignificant to reduce the excessive heat in the facility," Sanchez told reporters.

Florida Sen. Bill Nelson has asked for a federal investigation into the incident.

"I think it is an emerging scandal of gargantuan proportions," Nelson told reporters.

Trump visit

President Trump plans to visit the Naples, Florida, area Thursday, "to make sure the troops that he's put in place are doing their job," said his homeland security adviser Tom Bossert. The federal government is helping people secure shelter with money for rent, hotels or pre-manufactured housing, he said.

What's happening in the Florida Keys?

The lower Florida Keys remain off-limits as crews check 42 bridges on the only highway to the mainland. County officials are pushing back against an initial estimate by the Federal Emergency Management Agency that 25 percent of homes were destroyed and nearly all the rest heavily damaged. Monroe County Commissioner Heather Carruthers says "things look real damaged from the air, but when you clear the trees and all the debris, it's not much damage to the houses." Search-and-rescue teams haven't found casualties in door-to-door searches, but they're not entering shuttered homes.

CBS News correspondent Elaine Quijano reports power, running water and communications have been virtually nonexistent since Sunday, and those conditions, along with sweltering heat and humidity, have made the recovery process more difficult for both the thousands who stayed and the first responders there to help.

About 2,000 National Guard members are in the Keys to help distribute food and water. Crowds lined up at a parking lot in Key West on Wednesday. For many, it was the first aid they've received in four days.

"They were running out at the shelters," Bobby Ourada told CBS News. "We tried to get some last night. We couldn't get any, so thank God we finally got something."

Read more at CBSNews.com.