What is lightning? Lightning is a bright nash of electricity produced understorms produce a thunderstorm. All the lightning and are very dangerous, hear the sound of thunder, then you are in danger from lightning if you are outdoor. Lightning kills and tornadoes between 75 to 100 people What causes lightning? Lightning is an electric current. Within a thundercloud way up in the sky, many small bits of ice(frozen raindrops) bump into each other as they move around in the air All of those collisions create an electric charge. After a while, the whole cloud fills up with electrical charges. The positive charges or protons form at the top of the cloud and the negative charges or electrons form at the bottom of the cloud. Since opposites charges attract, that causes a positive charge to build up on the ground beneath the cloud. The grounds electrical charge concentrates around anything that sticks up, such as mountains, people, or single trees. The charge coming up from these points eventually connects with a charge reaching down from the clouds and zap-lightning strikes