Substation fires can be among the most intimidating destructive forces, and there are a number of ways they can get started, depending on the equipment used. The fires are commonly caused by hazards such as a mechanical failure combined with a combustible source, water getting into the system, or even an insulation failure. Many times, squirrels, rodents, raccoons, and other critters are culprits in damage, when they climb into substation plants via unprotected electrical lines and utility poles. These fires are exceptionally dangerous because of their potential for explosions, due in part to leaking oil that causes hazardous smoke. There can also be loose wires that aren't insulated, which could cause shock or electrocution. So, what actions should someone take should they encounter a substation fire?