It’s Fun Fact Friday! On October 22, 2017, a single bolt of lightning stretched 515 miles across the U.S. Great Plains — from eastern Texas all the way to Missouri — touching ground in five states. Verified by the World Meteorological Organization, it stands as the longest lightning bolt ever recorded. Unusually long bolts like this one even have their own name: megaflashes.
How Lightning Forms
Lightning primarily occurs when warm air mixes with colder air masses, creating the atmospheric disturbances needed to polarize the atmosphere. But not all lightning looks the same.
The most common type is intracloud lightning, which happens entirely within a single cloud. We often don’t see it clearly because it’s hidden inside the cloud. Then there’s cloud-to-cloud lightning, which jumps between two separate clouds and can create dramatic horizontal streaks across the sky. And the kind most people picture — cloud-to-ground lightning — is actually the least common of the three, accounting for only about 25% of all lightning. It’s also the most dangerous to people and structures.
You Can’t Have Thunder Without Lightning
Thunder is the sound produced by the rapid heating and expansion of air surrounding a lightning bolt. That air can reach temperatures of 50,000°F, creating a powerful shockwave. While it’s possible to hear thunder without seeing lightning (due to distance or cloud cover), the lightning always has to occur first — you simply can’t have one without the other. And because light travels far faster than sound, you’ll always see the flash before you hear the rumble.
Lightning by the Numbers
Lightning strikes Earth roughly 44 times every second, adding up to nearly 1.4 billion flashes per year. About 70% of those strikes occur over land in the tropics. The single most lightning-prone spot on Earth is Lake Maracaibo in Venezuela, where the Catatumbo lightning phenomenon produces an average of 250 bolts per day on approximately 297 days a year.
In the U.S., Florida has long been considered the lightning capital of the country — but last year, Oklahoma surpassed Florida in lightning flash concentration, recording 73 flashes per square mile. Texas, meanwhile, experienced the most total lightning flashes of any state: 13 million.
The “Never Strikes Twice” Myth
You’ve probably heard that lightning never strikes the same place twice. It’s one of the most persistent myths out there — and it’s completely false. Lightning tends to strike prominent or highly conductive objects repeatedly. The Empire State Building in New York City is struck an average of 23 times per year.
Lightning Safety and the Fear of Storms
The fear of lightning is called astraphobia, and it’s one of the most common specific phobias, affecting both people and animals. Your lifetime odds of being struck are about 1 in 15,300. If it does happen, roughly 90% of people survive — but many victims suffer lasting injuries, including neurological damage.
When it comes to staying safe, the best advice is simple: get inside a solid structure or vehicle. Standing up, crouching, or lying down outdoors all carry similar risk because lightning can travel along the ground. And despite what you may have heard, rubber-soled shoes offer no meaningful protection.
The Man Who Was Struck Seven Times
Roy Sullivan, a U.S. National Park Service ranger, holds a Guinness World Record for surviving seven separate lightning strikes between 1942 and 1977. He suffered multiple injuries across his body over the decades and earned the nicknames “Human Lightning Conductor” and “Human Lightning Rod.” Sullivan passed away in 1983 — from causes unrelated to lightning.