Accommodation is being sought for 110 pupils and their teachers who were evacuated from an outdoor education centre because of a gas leak.
A 3,000-litre gas cylinder has been made safe after it began leaking when an oak tree fell on it.
Two schools, from Italy and London, were staying at the Colomendy Centre in Loggerheads, Denbighshire, where an oak tree fell on six Calor gas cylinders.
More than 100 people - mostly children - were evacuated from the Colomendy outdoor education centre at Loggerheads in Denbighshire on Tuesday.
It is hoped the visitors will be able to stay at a nearby school overnight.
The evacuees, from two schools in Italy and London, spent the night at Howell's school near Denbigh.
There were no reported injuries and firefighters used a water jet to disperse the gas cloud.
The damaged tank was one of six at the centre which were being emptied by Calor Gas experts on Wednesday.
North Wales Fire and Rescue Service had made the area safe by Tuesday evening and left Calor gas staff at the scene to empty all six cylinders.
The incident occurred at about midday on Tuesday, and firefighters used a water jet to disperse the gas cloud. There were no injuries.
Each cylinder holds 3,000 litres of propane gas and once they are emptied then workers will be able to remove the fallen tree.
It is thought this will take until lunchtime on Wednesday with the gas workers set to carry on with the emptying process from first light.
The children and pupils were initially taken to a cafe at the Loggerheads County park, near Mold, following the incident at about midday on Tuesday.
The occupants of a nearby house were also asked to leave.
However, the children were later allowed to return and pick up any essential belongings after the gas was cleared.
It is hoped they will be able to return on Wednesday.
