This monograph especially emphasizes the importance of the scope, by which forest fires, from year to year endanger the environment, including casualties. Fire seized areas in 2000 in Europe only were over 920,000 ha. Cases relating to relatively small locations, but which burned in unsettled areas, are often unidentified, because the satellite sensors have limited possibilities in the view of the size of the area they can detect. It is similar to those situations on the fires with relatively short temporal range, and during that interval thick clouds are above such area for example and other admixtures stirring the atmosphere. It is necessary to point out that all those fire seized places, spatially limited on smaller localities, often cause fire spreading by their wideness and a sort of a plant mass, relief and geologic surface, humidity and precipitation or by suitable combinations. On the other side, especially in the last few years, we are witnesses to events when fire has seized tens of thousands hectares just in a “wave”, also penetrating through the urban areas.