The purpose of this study was to improve risk management and to investigate build-up of the costs of fire in waste-fuel stores, to make the authorities and the population in general aware of the substantial monetary and non-material benefits connected with preventive measures being taken. To summarize, the results from the case studies show that the fires occurred by self-ignition of organic materials, the storage facilities were badly and/or not properly designed, and the waste fuels were not handled properly. On the basis of two case studies the main finding was that there must be one person only in charge during the fire to lead the action, and the fire brigade must not leave the area too early. Nowadays, the real cost for the fire is not calculated properly, or at all, by the waste-management company. It is concluded that waste-management companies, society, and insurance companies could save money by implementation of precautionary measures. Such relevant measures are reviewed. It is recommended: not to store waste fuels too high, in volumes which are too large or too close to town districts; to promote better cooperation between waste companies and the fire brigades and the local EPA; and to make insurance companies demand implementation of more security measures before signing the insurance contracts.