An abnormal rise in temperature was detected at 6:30 am in a natural gas dryer of a grain silo. The audible alarm sounded and the dryer switched into safety mode (the burners stopped and both inlet and outlet ventilation closure was automatically controlled by the heat sensor). In accordance with the internal procedure for fires in a dryer, the silo manager stopped the grain supply, closed the natural gas valve, cut electricity and alerted emergency services and the company’s senior management. Fire-fighters located the hot spot at the top of the dryer with a thermal camera. The drying installation was emptied and emergency services and the operator then performed a visit inside the dryer to verify the absence of any remaining hot spots. The 80 tonnes of sunflower recovered were stored in metal bins and monitored for 72 hours. Damage was estimated at €2,000. Two external companies performed an intervention onsite to clean the dryer, and carry out the requisite repairs and checks before restarting the installation the next day. Dust accumulation was the cause of this accident. Following the accident, the operator modified the intervention procedure in case of fire to suit each type of dryer used.