Around 4:30 pm, following hot spot works (welding), in a cooperative farm silo, dusts were slowly burning between the side of a (40-tonne) barley bushel and the cladding on a handling tower. The subcontracted firm’s employee, who had benne working on-site until 4 pm, and the silo manager attempted in vain to control this combustion by spraying water between the two sidewalls. In remarking that the sheet metal of the bushel underneath their feet was heating up, they notified the fire crew, who drained the 40 tonnes of barley into the courtyard. This operation served no purpose (as the grain was cold), and smoke continued to escape. A survey aided by a thermal camera led to locating 2 hot spots inside the bushel and the adjacent cell, which was also empty; fire-fighters proceeded to extinguish these sources. Since smoke was still visible, first responders severed the fastening brackets on both sidings and gained access to the ignited dusts that they also extinguished, bringing the blaze under control by 9 pm. The facility manager conducted two rounds of monitoring at 11:30 pm and 4:30 am, neither of which revealed any anomaly. The measures adopted to prevent risks during maintenance works, i.e. hot work permitting, cleaning and sprinkling work zones, plugging interstices with wet cloths, all proved insufficient.