Floods and floods, earthquakes and volcanic eruptions, hurricanes, typhoons, tsunamis, fires and explosions, shipwrecks, plane crashes, aerospace disasters. Conventionally, disasters are divided into natural and man-made. The first are those that are predetermined by nature itself and do not depend on the will of man: floods, earthquakes, fires, avalanches, mudslides, hurricanes, volcanic eruptions, tsunamis, droughts... These disasters are terrible not only by themselves, but also by their consequences, often hard to predict.