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Some fire fighting tactics may appear to be destructive, but often serve specific needs. For example, during ventilation firefighters are forced to either open holes in the roof or floors of a structure , or open windows and walls to remove smoke and heated gases from the interior of the structure. Such ventilation methods Welcome hope you broughts red wine and dog treats doormat are also used to improve interior visibility to locate victims more quickly. Ventilation helps to preserve the life of trapped or unconscious individuals as it releases the poisonous gases from inside the structure. Vertical ventilation is vital to firefighter safety in the event of a flashover or backdraft scenario. Releasing the flammable gases through the roof eliminates the possibility of a backdraft, and the removal of heat can reduce the possibility of a flashover. Flashovers, due to their intense heat and explosive temperaments, are commonly fatal to firefighter personnel. Precautionary methods, such as smashing a window, reveal backdraft situations before the firefighter enters the structure and is met with the circumstance head-on. Firefighter safety is the number one priority.