Natural disasters driven by extreme climate and weather events are probably the types of disasters that mankind has been best adapted to. As the intensity and frequency of events become more serious due to climate change induced by global warming, the stability of the electric power supply and the safety of electrical infrastructures are more threatened. For the sustainable development of human civilization, it is most important to accurately identify hazards in the future environment and to reduce the risks caused by those hazards. However, depending on how these risks are defined and assessed, they may be considered serious or ignored. Therefore, it is necessary not only to identify the hazards well, but also to accurately assess and adapt to the risk of each identified hazard. In this paper, a methodology for assessing and adapting to the risks posed by climate change in the field of electrical installations is presented. The risk assessment methodology will support improving the resilience of the national power grid by enabling efficient use of limited national resources required for climate change adaptation.