So it is without any particular degree of piety that I share the following suggestions. While tailored around the possibility of electrical threats, this advice is applicable to other dangers, as well.
First, at any accident or disaster scene be aware of your surroundings. Remember to look up and inventory power line poles for any power lines that have been compromised and might fall down. Have your desk contact the power company responsible for the pole and have them respond to the location and shut off the power if possible.
If you find yourself dealing with a downed line, a good rule of thumb is to stay at least 15 yards away from it or any other damaged power source such as an electrical box.
Remember that the voltage on the ground is highest in the immediate area around the electrical source and decreases with distance. Walking over the area can cause a fatal shock.
If you find yourself in a traffic collision and believe there is a possibility of a downed power line on or near your patrol car, remain inside. If your vehicle is on fire and you have to get out, try to jump as far from the vehicle as possible without coming into contact with its metal parts.