The need to reduce greenhouse gas emissions in various sectors, including road transport, has resulted in the development of investments relating to the use of hydrogen as a fuel in motor vehicles. Currently, there are six
hydrogen refueling stations located in Poland, and the construction of another 13 is in the planning phase.
By storing flammable gas, these facilities may pose a threat to the environment, in particular, if they become
the target of foreign armed forces or terrorist activities. This article presents the effects of an event that resulted
in the mechanical damage of a compressed hydrogen tank. The ALOHA program is used to analyze the impact
of the threat. Two event scenarios are considered for summer and winter conditions. The simulation results
indicate that the most dangerous effect of the attack may be the overpressure resulting from the explosion
of the vapor cloud, ignited as a result of detonation after the leakage of the tank. It is, therefore, reasonable to
designate safety zones around such objects in order to minimize the effects of accidental release.