Sound travels 1 kilometer in roughly 3 seconds and 1 mile in roughly 5 seconds.
When you see the flash of a lightning bolt, you can start counting seconds and then divide to see how far away the lightning struck. If it takes 10 seconds for the thunder to roll in, the lightning struck about 2 miles or 3 kilometers away.
When lightning strikes a person who lives: The back of a man who was struck by lightning. There’s a reddish feathery pattern from the striking point to the exit point of the bolt. Only about 20% of people die instantly from lightning strikes.
During every minute of every day, roughly 1,800 thunderstorms are creating lightning somewhere on Earth. Though the chances of being struck by lightning are estimated at 1 in 700,000, these huge electrical sparks are one of the leading causes of weather-related deaths in the USA each year with an average of 73 people killed; about 300 people usually are injured by lightning.