Glass, plastic or ceramic insulators high up on power poles keep electricity from traveling down the pole to the ground. If an insulator breaks, or a power line becomes disconnected from the insulators that hold it up, the line can fall to the ground and energise the area around it with a lot of electricity. If you touch a downed line or even the ground near the line you could be hurt or killed. If a power line falls on a car and you touch the car and the ground at the same time, you would also get a shock. Volts, amps, and watts measure electricity.
Amps measure the amount of electric current.
Watts measure the amount of work done by a certain amount of current at a certain pressure or voltage. To understand how they are related, think of water in a hose. Turning on the faucet supplies the force, which is like the voltage. The amount of water moving through the hose is like the amperage. Hydro Power Hydro-electric power is one of the cleanest forms of power generation, although its use is limited by the availability of sufficient quantities of water.