Thirteen of the dead and 26 of about three dozen people wounded in Thursday's flash floods were middle school children, officials said.
A father of one of the survivors said a bus with 37 school children and seven teachers had been on a trip to the resort area.
Brig. Gen. Farid al-Sharaa, a Civil Defense spokesman, said Friday that the flooding was one of the deadliest incidents in recent memory involving schoolchildren.
"It swept away the students for four to five kilometres", some as far as the Dead Sea, he said.
The press officer said there was no information, yet, on the age of those killed in the flashflood and highlighted that those rescued suffered mild to serious injuries.
The Jordan Meteorological Department (JMD) announced on Monday that a depression and a relatively cold air mass were expected to affect the country as of Thursday, head of the JMD's weather forcasting said on Thursday.
Heavy rain has been sweeping the region for several days.
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Jordanian Prime Minister Omar Razzaz sent his condolences to the families of the victims, promising an investigation into the incident, and said that anyone responsible would be held accountable.
The search for survivors continued after daybreak, with helicopters and teams with sniffer dogs scouring the rocky slopes near the Dead Sea in the Jordan Valley.
"Currently assisting Jordan in rescuing a bus full of children swept away in a flood on the Jordanian side of the Dead Sea", it wrote on Twitter.
In April, 10 Israeli students were killed when they were surprised by a flash flood during a hiking trip near the Dead Sea.
Police were investigating whether the trip organizers lied to participants about the safety of the trail they planned to take amid unseasonably heavy rains as well as about their coordination with relevant authorities, who had issued flash flood warnings for the areas.
At least 17 are dead; more than 20 were injured.