At least seven people were injured Thursday after a section of a cliff collapsed on Navagio beach, also known as Shipwreck Beach, narrowly missing a family sitting on the sand and capsizing at least two small vessels.
The beach was evacuated and boats were banned from approaching the shore until further notice.
A Czech woman suffered back injuries and was transferred to hospital, a coast official said. Her husband and two children were also hospitalized with minor injuries, along with three other beachgoers who were treated and released. O'Connell estimates there are around 400 to 500 people in the area when the rockfall occurred and around a dozen tourist boats were out in the bay.
"There was a noise and a small piece of rock fell, then a second bigger and finally a third big piece of rock that during the fall created a sea whirlpool that overturned the boats", one eyewitness said.
He continued: "I thought more was coming and with the size of the waves coming towards me I just started running".More news: More than 80,000 without power in North Carolina as Florence moves closer
Imagine the worst beach trip you possibly can.
Greek authorities said they had received no reports of missing people but that search and rescue teams were continuing to operate by air and sea into the late afternoon as a precaution.
Lynette Bridges, 58, was on a tour boat, pulling up to "Shipwreck Beach" as the incident happened.
He said: "The rock that fell would be like a four-storey building falling on to the beach".