When we check statistics of the results of electrical hazards around the world, we found out that houses in the United States have double risk of getting partially or completely burn compared to other developed western countries because of two important factors:
1- The house structure
In the United States the structure of houses and condos is built by wood frames and drywall, all the electrical wiring is connected behind the dry wall and attached to the wood frames.
2- The voltage
The most common voltage in residential homes is 120, compared to many other countries around the world, in instance, all the European countries utilities run with 240 voltage to their residential homes, so you may ask what is the difference?
The wires that run with the 240 voltage supply are consuming less current, these wires are also thinner than the 120 voltage wires, they are thinner because less current means less heat, and less heat on the wires means less potential of electrical hazards.
The 120 voltage system we use for residents in the United States work exactly the opposite way, so the result of it is more heat on the wire and thicker wires to hold that heat, unfortunately the combination of heat on wires within a wooden structure causes many types of electrical hazards that can lead to a fire tragedy, this is why it's very important to check periodically that your house is safe of any type of electrical hazards, the amount of money you will spend on this safety recheck is considered minimal compared to the real problems these hazards cause every year to thousands of thousands of american homes.