Lightning forms in thunderclouds, specifically cumulonimbus clouds. They are created when hot, moist air rises into the atmosphere and condenses. Positive and negative charges build up in the cloud. About one-third of lightning strikes reach the ground. When lightning strikes some object on the ground, it is more likely to hit tall objects, such as trees, poles, or buildings. This can be very dangerous, since the electricity in a lightning bolt can be hotter than 50,000 degrees and travel at speeds up to 150,000 mph! When a house is hit by lightning, the electricity can travel throughout the house through the electrical wiring. Some buildings .....