Less than 3 weeks following an identical accident, an explosion followed by a fire occurred in a wood chip and dust storage silo used to feed the boiler of a moulded plywood company. The firemen sprayed and released smoke from the silo (no visible flame). The venting system performed correctly. The silo was completely emptied. The accident was the result of renewed heating of the wood dust caused by the previous fire. The silo had not been totally emptied despite the presence of wood and dusts that were extremely wet from the firefighting water. The operator called upon the various constructions companies that built its equipment in order to find solutions.