How can electricity harm us

Contact with electricity can cause:

Electrical shock
this is when electrical current passes through the body. Even a small shock can be frightening and painful.
Burns
electrical current can burn the skin, nerves, muscles and tissues in the body.
Death
a severe electrical shock can cause problems with a person's breathing and heartbeat, possibly leading to death.
What to do in an electrical emergency
Downed Wire
Stay away from all downed wires - even if there are no sparks.
Do not touch anything, or anyone, that is touching an electrical wire.
Get help right away.
Downed Wire Touching a Vehicle
If you are inside a vehicle, wait inside for help.
If you must get out, jump clear without touching the ground and the vehicle at the same time.
If you are a witness, stay clear and call for help.
Electrical Fire
Get help right away.
Unplug the faulty appliance to turn off the power, if possible.
Important: Never throw water on an electrical fire.
Electrical Shock
Never touch a person who is being shocked.
Unplug the faulty appliance or turn off the power, if possible
Call for help immediately.