CHARLESTON, S.C. (AP) — The U.S. death toll from Hurricane Ian has risen to 17 as Florida authorities on Friday afternoon confirmed several drowning deaths and other fatalities.

The Florida Department of Law Enforcement said the deaths included a 22-year-old woman who was ejected from an ATV rollover on Friday because of a road washout in Manatee County and a 71-year-old man who died of head injuries when he fell off a roof while putting up rain shutters on Wednesday. Many of the other deaths were drownings, including a 68-year-old woman who was swept into the ocean by a wave.

Another three people died in Cuba as the storm made its way north earlier in the week. The death toll was expected to increase substantially when emergency officials have an opportunity to search many areas hardest hit by the storm.

A revived Hurricane Ian battered coastal South Carolina on Friday, ripping apart piers and filling neighborhoods with calf-high water, after the deadly storm caused catastrophic damage in Florida and trapped thousands in their homes.

Ian’s center came ashore near Georgetown with much weaker winds than when it crossed Florida’s Gulf Coast on Wednesday as one of the strongest storms to ever hit the U.S. As it moved across South Carolina, Ian dropped from a hurricane to a post-tropical cyclone.

Sheets of rain whipped trees and power lines and left many areas on Charleston’s downtown peninsula under water. Four piers along the coast, including two at Myrtle Beach, collapsed into the churning waves and washed away. Online cameras showed seawater filling neighborhoods in Garden City to calf level.

Ian left a broad swath of destruction in Florida, flooding areas on both of its coasts, tearing homes from their slabs, demolishing beachfront businesses and leaving more than 2 million people without power. At least nine people were confirmed dead in the U.S. — a number that was expected to increase as officials confirm more deaths and search for people.

Rescue crews piloted boats and waded through riverine streets Thursday to save thousands of people trapped amid flooded homes and shattered buildings .

Florida Gov. Ron DeSantis said Friday that crews had gone door-to-door to over 3,000 homes in the hardest-hit areas.

“There’s really been a Herculean effort,” he said during a news conference in Tallahassee.

Among those killed were an 80-year-old woman and a 94-year-old man who relied on oxygen machines that stopped working amid power outages, as well as a 67-year-old man who was waiting to be rescued and fell into rising water inside his home, authorities said.

Officials fear the death toll could rise substantially, given the wide territory swamped by the storm.

Florida Division of Emergency Management Director Kevin Guthrie said responders have focused so far on “hasty” searches, aimed at emergency rescues and initial assessments, which will be followed by two additional waves of searches. Initial responders who come across possible remains are leaving them without confirming, he said Friday, describing as an example the case of a submerged home.

“The water was up over the rooftop, right, but we had a Coast Guard rescue swimmer swim down into it and he could identify that it appeared to be human remains. We do not know exactly how many,” Guthrie said.

Desperate to locate and rescue their loved ones, social media users shared phone numbers, addresses and photos of their family members and friends online for anyone who can check on them.

Orlando residents returned to flooded homes Friday, rolling up their pants to wade through muddy, knee-high water in their streets. Friends of Ramon Rodriguez dropped off ice, bottled water and hot coffee at the entrance to his subdivision, where 10 of the 50 homes were flooded and the road looked like a lake. He had no power or food at his house, and his car was trapped by the water.

“There’s water everywhere,” Rodriguez said. “The situation here is pretty bad.”

University of Central Florida students living at an apartment complex near the Orlando campus arrived to retrieve possessions from their waterlogged units.

Deandra Smith, a nursing student, was asleep when others evacuated and stayed in her third-floor apartment with her dog. Other students helped get her to dry land Friday by pushing her through the flooded parking lot on a pontoon. She wasn’t sure if she should go back to her parents home in South Florida or find a shelter so she can still attend classes. “I’m still trying to figure it out,” she said.