Have the electrical wiring in your residence checked by an electrician.
Inspect extension cords for frayed or exposed wires or loose plugs.
Make sure outlets have cover plates and no exposed wiring.
Make sure wiring does not run under rugs, over nails, or across high-traffic areas.
Do not overload extension cords or outlets. If you need to plug in two or three appliances, get a UL-approved power supply cords with built-in circuit breakers to prevent sparks and short circuits.
Make sure insulation does not touch bare electrical wiring.