Electricity is the biggest cause of fire due to a number of reasons.
Over loaded sockets, Loose connections, heaters covered all cause fires.
If you get a smell from any electrical device please check it out. Switches or plugs that are warm to the touch are dangerous and should be checked out.
Smoke detectors and heat detectors will give an audible signal to warn you of fire.
CO2 detector in any room that has a fire, gas or oil stove is a must.