Exactly how this polarization occurs is still a mystery. When the leader and streamer meet, a closed circuit is created and electrical current begins to flow. Electrons are discharged onto the ground and an upward moving return stroke heats the air and makes lightning visible. Lightning is very powerful. It can discharge millions of volts of electricity, propel return strokes at nearly the speed of light, and heat surrounding air up to thousands of degrees Fahrenheit.
Lightning is extremely dangerous, highly unpredictable and very fickle.
Each year, many more males than females are killed by lightning in the United States. Lightning does strike the same place twice. The Empire State Building in New York City is struck on the average of about 23 times per year. Rain from a passing thunderstorm wet the ground and sheep, causing the lightning's electrical discharge to move completely through the herd of sheep. Lightning Safety Rules Lightning normally strikes the tallest object in an area, and is particulary attracted to metal and objects near or on water.