High temperature sources can be of different nature [1]. This article deals with the fire hazard investigation of different forest fuels and biomaterial (human skin) exposed to the high temperatures of sufficiently small size ceramic particles (a parallelepiped of different sizes). Such particles can be formed as a result of technological accidents accompanied by fires that are occurred in industry facilities situated in forested areas. Forest fuel specimen corresponds to the typical biocoenosis in Tomsk region Timiryazevskiy forestry. Thermal properties of human skin correspond to the one of hand. The calculations were performed on up-to-date computer system using finite difference method [2,3]. In the results of the computations there were investigated forest fuel pyrolysis and skin thermal destruction caused by influence of the high temperature ceramic particles. There were mathematically determined the regularities of forest fuel pyrolysis and human skin burns for the different initial temperatures of the ceramic particles. The investigation identified the mechanism and conditions for the thermal destruction of forest fuel and human skin influenced by a single high temperature heated ceramic particle. The obtained results are the objective basis for the natural biomaterials thermal destruction generalized mathematical model development based on the established physical mechanisms of the investigated processes. There were shown a high fire danger and moderate threshold of the thermal injuries caused by the single high temperature ceramic particles.