Residents and relatives of flood victims gather outside a hospital near the Dead Sea in Jordan October 25, 2018. (Photo: Reuters)

At least 18 people were killed Thursday when flash floods swept away a group of teachers and students visiting hot springs near the Dead Sea, Jordan’s state media said.

The private school students and their adult chaperones were caught off guard when sudden torrential rains unleashed a flood surge, the reports said.

At least 34 people were rescued in a dramatic operation involving helicopters, marine divers, swimmers and boats, according to the website of the Jordan Times.

After nightfall, huge spotlights were trained on the search area.

Late on Thursday, 10 more students and a teacher were found and awaiting rescue, media reports said. Israel’s military said it also dispatched helicopters carrying a rescue team.

The media reports did not provide the ages of the students.

Prime Minister Omar Razzaz rushed to the scene, overseeing part of the rescue operation and visiting the wounded at an area hospital.

As the death toll continued to rise Thursday evening, Jordan’s King Abdullah II announced that he canceled a visit to Bahrain, which had been scheduled for Friday.