http://www.nfpa.org/itemDetail.asp?categoryID=445&itemID=18690&URL=Research/Fire%20investigations/Non-residential%20properties On June 8, 1998, a series of explosions occurred at one of the largest grain elevators in the world, killinghttp://nfpa.typepad.com/.a/6a00d8351b9f3453ef01538eea1ea6970b-pi seven and injuring ten. The facility, located in Haysville, Kansas, was being prepared for the early summer harvest of wheat; workers were preparing the facility by cleaning the gallery houses at the top of the silos as well as the conveyor tunnels under the silos. The ignition source is unknown, even after an investigation.
http://nfpa.typepad.com/.a/6a00d8351b9f3453ef01538eea1c59970b-piNFPA members can download a free copy of the NFPA investigation report on this incident. All visitors can read a summary of the event.