The aim of the paper is to assess the possibility of using emergency assessment software and the differences between world-developed computer programs and methodologies in assessing the impact and risk levels of an area of increased hazards associated with the storage of liquefied petroleum gas (LPG). The study group includes 16 different effect assessment methods, with the help of which the comparison of the effects of an accident in the event of a liquefied petroleum gas leak and an explosion of heated liquid (fireball) has been performed. The study did not result in a single coherence between the results of the calculation of the effects proposed by the methods, which resulted in a chart showing the main results of the calculations, as well as explanation on the importance of differences. Within the working framework it was explained how variations with the level of consequences affect the level of risk to be calculated at the object of the increased hazard and what problems it may cause. The use and comparison of the pooling of methods provide an opportunity to explain the consequences for a person in an accident with LPG, and it is therefore of extreme importance to carry out an examination of the methods applied and to compare the effects between them. When exposed to the human body, the fireball may result in burns of varying degrees associated with the heat of the fireball and the duration of exposure to the fireball, so the pooling of methods should provide an answer on the average effect level and information on the event that can be useful in assessing the risk level at the increased hazard object.