Electric power has become essential for our everyday tasks. When we are deprived of it for a certain period of time, there are consequences that come as a chain reaction and compromise our daily functions. Therefore, it is of utmost importance that power is available continuously with the minimum amount of disruptions possible. To achieve this, preparations are to be made in advance so that when failures occur, whether due to natural or intentional causes, they are not of great effect and can be fixed in the shortest possible time. In this paper, we focus on improving the infrastructure of the electric power system when random interruptions, like natural disasters, occur by assessing the vulnerability of a grid considering the design and operation of it, taking into account that when disruptions are due to natural causes, they can be classified as random failures. Therefore, it is important to find the critical components in the network to prevent a natural phenomenon from greatly affecting the system.