Ny maha-samihafa ny varavaran’ny afo fitaratra sy ny varavarana afo vita amin’ny hazo sy vy dia izy ireo dia voapetaka amin’ny faritra midadasika amin’ny fitaratra tsy misy afo. Ny fitaratra varavarana afo avo lenta dia mbola afaka mitazona mihoatra ny 90 minitra eo ambanin’ny fiantraikan’ny lelafo hatramin’ny 1000 ° C, izay manome fotoana sarobidy ho an’ny fandosiran’ny olona sy ny voina.

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