Electricity has become an indispensable part of life, which belongs to today's modern household. On the contrary, there is an increasing dependence on sources of electricity. It is used in all sectors of human life, including the sector of health care. Today, healthcare is dependent on sources of electricity. Therefore, several clients are dependent on electricity availability in healthcare facilities; however, there are situations as a blackout. It could be caused by several events, such as disasters that could cause cascading effects. This impact is significant for healthcare facilities. Healthcare facilities must ensure that the supply to critical electrical circuits is not interrupted. In the event of a blackout, alternative sources of electricity are used immediately. One of them may be aggregates that could replace the electricity supply. However, these resources depend on fuel supplies. Most healthcare facilities do not have sufficient fuel supplies to supply healthcare facilities during a blackout. Healthcare facilities' attitude is to use the purchase of fuel for aggregates at the nearest fuel stations. But here comes the critical question. Will the fuel stations be operational even in the event of a locally more massive blackout? Where do we get the fuel? Will the state provide us with funds from the Administration of State Material Reserves (ASMR)? We will get the answer to these questions in this paper. The aim of the paper will be to solve loss prevention in times of blackout. The paper will be divided into several parts. Firstly, there will be evaluated of the current situation. Secondly, there will be a proposal for loss prevention in blackout times - an algorithm for solving healthcare facilities' fuel supplies.