Everyday people are often at risk for electric shocks at the workplace and in their homes. Electrical shocks can be caused by overhead power lines, damaged cords, defective tools, lack of ground‑fault protection, improper wiring, and improper use of extension cords. Electrocution can cause serious burns, nerve damage, muscle damage, blindness, and other injuries. In severe cases, it can cause the heart to stop, resulting in death.