Lightning
Because light travels much faster than sound, the time between a lightning bolt and thunderclap will tell you how far away the lightning is. Each 5-second count equals one mile. If the time between a lightning flash and a thunderclap is 15 seconds or less (three miles or closer), a lightning strike may be imminent, and you should take precautions. Other signs of an imminent lightning strike include tingling of the skin or hair standing on end.
Lightning typically strikes the tallest object in the area and is attracted to metal objects. If a lightning strike is imminent, we will move away from handcarts toward the lowest spot in the area. You should keep your feet close together and stay as low as possible, with no other part of you body touching the ground. Minimizing body contact with the ground reduces the risk of being hit.