1. Faulty electrical wiring or overloaded electrical outlets 2. Improperly stored flammable materials such as gasoline, paint, or cleaning supplies 3. Cooking accidents, such as leaving a stove unattended or grease fires 4. Smoking indoors or improperly disposing of cigarette butts 5. Heating equipment, such as space heaters or fireplaces, that are not properly maintained or used incorrectly