A catastrophic collapse of a pile of accumulated coal waste slides and engulfs a school in Aberfan, South Wales, killing 116 children and 28 adults. The pile had been created on a mountain slope above the Welsh village near Merthyr Tydfil, and overlaid a natural spring.
Heavy rain led to a build-up of water within the tip which caused it to suddenly slide downhill and engulfed the Pantglas Junior School and a row of houses. Many of the village's residents developed medical problems as a result of the disaster, and half the survivors have experienced post-traumatic stress disorder at some time in their lives.
By Unknown - Original publication: UnknownImmediate source: https://www.flickr.com/photos/57578811@N06/5304448493/, Fair use,