How Dangerous Is Lightning, Really?
Lightning is one of the most common and underestimated weather hazards in the United States. Each year, dozens of people are killed by lightning and hundreds more are injured. Despite this, many people continue to take unnecessary risks during thunderstorms, often because of persistent myths about how lightning behaves.
The good news: lightning deaths have declined significantly over the past several decades as awareness has improved. Understanding the real facts — and letting go of the myths — is key to staying safe.
Common Lightning Myths — Debunked
Myth: Lightning never strikes the same place twice.
Fact: Lightning frequently strikes the same location multiple times — especially tall structures like skyscrapers, towers, and trees. The Empire State Building, for example, is struck dozens of times each year. Height, pointedness, and isolation are what attract lightning, not some invisible "used up" quality of a location.
Myth: If it's not raining, you're safe from lightning.
Fact: Lightning can strike from a storm that's more than 10 miles away — in completely clear skies overhead. These "bolts from the blue" are less common but extremely dangerous because people are often caught completely off guard. If you can hear thunder, you are within striking range of lightning.
Myth: Rubber-soled shoes or car tires protect you from lightning.
Fact: The rubber in shoes or tires provides essentially no protection against a lightning bolt carrying hundreds of millions of volts. Cars are actually relatively safe to be inside during lightning — but that's because of the metal frame, which acts as a Faraday cage directing current around the occupants, not because of the tires.
Myth: You should lie flat on the ground during lightning.
Fact: Lying flat actually increases your exposure to ground current, which can spread out from a lightning strike point and still cause serious injury. If you are caught in the open, the recommended posture is to crouch low on the balls of your feet with feet together, covering your ears — minimizing your contact with the ground.
The 30-30 Rule
The simplest lightning safety rule to remember is the 30-30 Rule:
- Go inside when the gap between seeing lightning and hearing thunder is 30 seconds or less (meaning the storm is within 6 miles).
- Stay inside for at least 30 minutes after the last clap of thunder.
Safest Places to Be During Lightning
- Best: A fully enclosed building with plumbing and electrical wiring (the systems help conduct lightning safely into the ground).
- Good: A hard-topped metal vehicle with windows fully closed.
- Avoid: Open fields, hilltops, isolated tall trees, bodies of water, open structures like picnic shelters, and convertible vehicles.
What to Do If Someone Is Struck
It is safe to touch a lightning strike victim — the human body does not store electrical charge. Call 911 immediately. If the person is unresponsive and not breathing, begin CPR if you are trained. Lightning strike survivors often suffer cardiac arrest, burns, neurological damage, and hearing or vision loss — immediate medical attention is critical.
The bottom line: when thunder roars, go indoors. It's that simple, and it works.