Rent The Devil at Four O'Clock (1961)

A seaplane lands on the island of Talua to unload three criminals - including Harry - plus a young priest, Father Perreau, who has come to succeed aging, irascible Father Doonan. When an earthquake and volcanic eruption strike Talua, Father Doonan persuades Harry to parachute with him into the mountains on a daring rescue to an isolated hospital. The party - mostly children - is menaced by landslides, forest fires, flowing lava and the near-collapse of a footbridge as they make their perilous way to safety.