Forest fires are generally consciously or unconsciously the work of man for various reasons. Fires generated byvoltaic arc between power lines and the underlying trees do not occur often. These few cases may be only demonstratedby analyzing around the site where the arc may have been generated. Material such as leaves, bark and soil can beanalyzed to find the metallic residues from the fused cables. The electrical cables usually composed of aluminum orcopper alloys, when involved in an electric arc may spray fused micro-drops of metals, increasing the natural levelof such elements. In two cases, the Al and Cu concentrations were increased by between 2.56 to 13.9 times thebackground levels. Electron microscopy of leaf surfaces has identified some profound alterations produced by theintense heat of the electrical discharge.