Here’s the thing nobody thinks about when they picture a lightning strike: the bolt hitting the ground isn’t the end of the danger. It’s kind of the beginning.
When lightning hits the earth, that electrical current doesn’t just stay put. It spreads outward through the ground in all directions from the strike point. If you’re standing nearby — even if the bolt never came close to touching you — that current can enter your body through your feet, travel through your cardiovascular and nervous systems, and exit out the other side. According to the National Weather Service, the greater the distance between where the current enters and exits the body, the worse the potential injury. That’s also why large farm animals are so vulnerable — their wide stance gives the current more of the body to travel through.
And that ground current? According to the National Weather Service, it causes the most lightning deaths and injuries of all the ways lightning can strike — more than a direct hit.
So what does it actually do to you? Research published in medical literature explains that the massive surge of electrical current can depolarize the entire heart — essentially scrambling the electrical signals that keep it beating in rhythm. The CDC puts it plainly: lightning often causes a heart attack. Your heart just… stops.
The practical takeaway is simple but real. During a thunderstorm, being *near* a strike zone is genuinely dangerous — not just dramatic. Lying flat on the ground doesn’t protect you and can actually increase your contact area with the ground current. Standing under a tall isolated tree is one of the worst places you can be. If you’re caught outside with no shelter, crouch low on the balls of your feet with your feet together to minimize your contact with the ground — but get inside as fast as possible. Get inside a solid building or a hard-topped vehicle, stay away from fences, pipes, and anything metal that can conduct current over a distance, and wait it out. Distance from the storm matters, but so does what you’re standing on and near.