Abstract
This article contains the problems of the snow avalanches. What happens with people under the snow, it means polytraumatic shock, traumatic asphyxia and hypothermia.
The aim of this article is to inform compactly about gained observations, about researches and new information used for first saving, (for friendly first help). There are some single factors which cause birth of avalanche.
The article describes also statistics about people'mortality of regailing persons, in dependence on time. The charts show some avalanche accidents in the world which illustrate big danger of these accidents.