The avalanche struck Pantglas Junior School on Moy Road, demolishing and engulfing much of the structure and filling classrooms with thick mud, sludge and rubble; 109 children, from 240 attendees, and five teachers were killed in the school. The pupils of Pantglas Junior School had arrived only minutes earlier for the last day before the half-term holiday, which was due to start at 12.00 pm. The teachers had just begun to record the children's attendance in the registers when the landslide hit. The adjacent secondary school was also damaged, and 18 houses on surrounding roads were destroyed. Mud and water from the slide flooded other houses in the vicinity, forcing many to evacuate their homes. Once the slide material had come to a halt, it re-solidified. A huge mound of slurry up to high blocked the area. The acting headmaster of the secondary school recalled: