Explosión de la escuela de Ortuella Historical milestone · Ortuella, Bilbo Handia / Gran Bilbao, Bizkaia Image of Ortuella, not of the place itself. On 23 October 1980, a buildup of propane gas in the basement of the Escuela Nacional Marcelino Ugalde caused an explosion when a plumber struck a match while repairing a drain; 53 people died, 50 of them children between 5 and 6 years old. The "Flor Truncada" (Broken Flower), a sculpture by José Noja, commemorates the victims. 23 de octubre de 1980 Photo: Javitxuf (CC BY-SA 3.0) What to see and do in Ortuella