Sand Hole Safety on North Myrtle Beach: What Every Visitor Needs to Know

The shovel was still standing in the sand when the North Myrtle Beach Police Department posted about it. A hole — big enough to swallow a grown adult — had been left on the beach over the weekend, red solo cups scattered in the bottom, a child’s red shovel propped against the rim. Whoever dug it had a great time. They just didn’t fill it back in.

This is one of those beach safety topics that doesn’t get nearly enough attention, buried somewhere between the sunscreen reminders and the rip current warnings. And that’s exactly why it needs to be talked about. Sand holes look harmless. They’re practically a right of passage at the beach — something every kid has done, something every parent has watched with a smile. But left too deep and left behind, they become something else entirely.

North Myrtle Beach has a city ordinance on the books about this. Beach patrol and local police are asking visitors to take it seriously. And the science — documented in peer-reviewed medical journals — backs up why. Here is everything you need to know before your next beach day on the Grand Strand.

What We Saw on the Beach This Weekend

The North Myrtle Beach Police Department shared the photo that prompted this article. A large, deep hole — well over the 12-inch limit set by city ordinance — left unattended on a public beach section. Shovels still upright in the sand. Litter in the bottom. The group who dug it had packed up and gone home, apparently unaware of the risks they left behind for anyone who might walk by after dark, or come running at full sprint the next morning without looking down.

It’s not a rare scene along the Grand Strand. Every season, deep holes are left behind on Cherry Grove Beach, Ocean Drive, Crescent Beach, and Windy Hill. The people who dig them aren’t malicious — they’re just having fun and don’t think twice about what they’re leaving. This article is about changing that.

The Real Danger of Deep Sand Holes

This is where the statistics are genuinely startling. Research published in the New England Journal of Medicine documented 52 dangerous sand hole collapse incidents in the United States over a roughly 10-year period. Of those cases, 31 people died — a fatality rate of 60%. The other 21 survived, but many required CPR to be resuscitated.

Sand hole deaths are roughly as common as shark-related fatalities in the United States — and yet almost no one talks about them. In February 2024, a 7-year-old girl died after a roughly 5-foot hole she and her brother dug at a Florida beach collapsed and buried her alive. The 20 or so bystanders who rushed to help — digging with their hands and plastic pails — couldn’t free her before the sand kept caving back in.

Studies estimate that three to five children die in the United States each year from collapsing sand holes — at beaches, parks, and even at home. Victims in the reported cases ranged in age from 3 to 21 years, with 87% of them male. These are not freak accidents limited to one region. They happen on public beaches up and down the East Coast, including right here in the Carolinas.

The problem isn’t that digging is inherently evil. It’s that a deep hole looks — and feels — much more stable than it actually is. And that gap between perception and reality is what makes them so dangerous.

Why Sand Collapses Faster Than You Think

Sand behaves in a way that’s deeply counterintuitive. When it’s wet, surface tension between water molecules and sand grains holds the walls of a hole upright — well enough that you can carve out a neat, vertical surface that looks solid and permanent. Experienced hands at the beach can shape sand into towering castle walls using this principle. But that stability is borrowed.

Once the sand dries out, that surface tension is gone. With nothing holding the grains together, the hole collapses — usually without any visible warning beforehand. A footfall near the edge of a hole can be enough to trigger a collapse, because sand — despite how solid it looks — flows more like a liquid once its structure fails. Wet sand can weigh as much as 130 pounds per cubic foot, meaning a modest wall of the stuff can generate crushing, immobilizing force the instant it falls inward.

Sand collapses are what engineers call a brittle failure — there’s very little deformation to warn you that a collapse is about to happen. It occurs suddenly, and the compacted sand locks immediately around whatever — or whoever — is inside. That’s what makes rescue so difficult. Responders can’t simply dig straight down into the collapse site; that approach risks further cave-ins and can make things worse.

Night, Tides, and the Risks You Can’t See

A hole dug at noon under clear skies becomes invisible at 9 p.m. The Grand Strand sunsets are spectacular — people walk the beach well after dark, especially in the warmer months, enjoying the cooler air and the sound of the surf. At night, a deep unfilled hole blends completely into the surrounding sand. A jogger, a couple walking hand in hand, a child racing ahead of their parents — any of them could stumble straight in.

Tides compound the problem in a different direction. A hole dug above the tide line can flood rapidly as the tide comes in. A person or animal caught in a flooding hole faces not only entrapment but drowning risk as water fills the space faster than they can react. Rising tides also destabilize sand walls further, accelerating the collapse timeline.

There’s also a practical concern for the people whose job it is to keep the beach safe. North Myrtle Beach runs beach patrol and emergency response vehicles along the shore. A deep hole in the sand — especially an unmarked one — presents a real hazard to those vehicles, which can become immobilized if a wheel drops unexpectedly. When emergency vehicles lose time, response times to actual life-threatening situations on the water increase.

The Impact on Sea Turtles and Coastal Wildlife

The South Carolina coast is active nesting territory for loggerhead sea turtles, a threatened species that comes ashore at night to lay eggs along the same beaches where families spread out their towels during the day. Female turtles follow the shoreline’s natural grade — the gentle slope from the dunes to the waterline — as they navigate up from the surf. An unexpected drop into a deep hole can trap a turtle on her back or leave her so disoriented that she never makes it back to the ocean.

Wildlife ranging from sea turtles to crabs to small fish can become trapped in or injured by unfilled beach holes, sometimes suffering lasting physical damage. Hatchlings, which emerge at night and instinctively orient toward the brightest horizon (the ocean surface), can tumble into holes and be unable to climb back out. A single nesting season along Cherry Grove or Ocean Drive involves dozens of active nests — and every responsible beachgoer plays a role in giving those hatchlings a clear path to the water.

Filling in your hole before you leave costs you about two minutes. For a loggerhead sea turtle hatchling navigating that same stretch of beach at 2 a.m., it could mean survival.

The North Myrtle Beach City Ordinance: The 12-Inch Rule

The City of North Myrtle Beach is clear on this: any hole dug on a public beach that exceeds 12 inches in depth must be filled in before you leave. This isn’t buried in fine print — it’s an active ordinance that beach patrol officers enforce, and the North Myrtle Beach Police Department has made a point of reminding visitors about it publicly.

Twelve inches is roughly knee height on most adults, and chest height on a toddler. It’s a generous standard — plenty of room for enthusiastic sandcastle builders and kids with buckets. The rule isn’t designed to take the fun out of digging. It’s designed to prevent the specific category of danger that comes from leaving a human-sized excavation unattended in a public space.

Think of it as the same social contract that governs picking up after your dog, respecting the sea oats and dune fencing, and keeping the beach free of litter. North Myrtle Beach has been welcoming families to its ten miles of coastline for generations — from the wide flats of Windy Hill to the shelling grounds of Cherry Grove. Keeping those beaches safe is a shared responsibility, and filling your hole is one of the easiest ways to do your part.

How to Dig Safely (and Still Have Fun)

Let’s be direct about something: sand digging is a wonderful part of being at the beach. Kids should dig. Families should build. The goal here isn’t to put away the shovels — it’s to use them wisely. Here are the practical guidelines that let everyone have a great time and go home safely.

Keep it shallow. Stay under 12 inches — roughly knee height for an adult or waist height for a young child. Deep holes are where the danger begins. Shallow digging for sandcastles, moats, and channels is completely safe and endlessly entertaining.

Never let anyone sit or stand inside a deep hole. Especially children. The danger isn’t just digging — it’s occupying a hole that’s deep enough to surround the torso. If your child starts climbing in, redirect them.

Dig away from the shoreline when possible. Holes near the water are subject to rapid tidal changes, which destabilize sand walls faster and flood excavations suddenly.

Assign someone to fill duty. Make it part of the pack-up routine — sunscreen in the bag, umbrella down, chairs folded, hole filled. It takes about the same amount of time as carrying your cooler back to the parking lot.

If you see a deep unfilled hole left by others, fill it. Be the person who takes the two minutes. The next beachgoer walking by at sunset — or the sea turtle navigating that stretch at midnight — will benefit from it.

What to Do If a Hole Collapses

Speed is everything. If someone is buried in a sand collapse, call 911 immediately — do not wait to see if the situation resolves on its own. While waiting for emergency services, have bystanders begin carefully moving sand away from around the victim. The instinct to dig straight down can cause further collapse; trained rescuers work by forming a wider excavation area around the collapse point, moving sand outward rather than directly downward to stabilize the surrounding walls.

If the victim is visible, talk to them constantly to maintain awareness of their consciousness. Sand compresses the chest and restricts breathing — the faster you can free the torso, the better the outcome. North Myrtle Beach maintains 54 lifeguard towers along its coastline during peak season, and their teams are trained in beach emergencies including sand-related incidents.

The best emergency response, of course, is the one that’s never needed. Fill the hole.

Frequently Asked Questions