Check extension cord capacity. By checking the appliances you have connected to the cord, you can see if you've exceeded the capacity. Some extension cords can burn out before home circuit breakers or fuses can do their job. Plugging them into each other increases the heat and danger. Don't place cords under a rug or on a wall.
Rugs hide frayed wires and can ignite from the heat, as can many walls.
Use grounded cords. Three-prong grounded extensions cords must be used with tools and appliances that have three prongs. Childproof your home. If your children are younger than 5, don't let them play with electrical toys. Take these steps now so you and your loved ones won't be sorry later.