Is it safe to be on a playground when there is lightning?

The short answer

No. Once you can hear thunder, nowhere on a playground is safe, and the right move is to walk to a building or a car straight away. The National Weather Service puts it plainly: there is little you can do to reduce your risk outdoors, and "the only completely safe action is to get inside a safe building or vehicle"².

Two beliefs keep this question alive. One is that metal equipment attracts lightning, so a plastic or wooden playground must be safe (the trade-offs between those materials lie elsewhere). The other is that you can wait for the rain, or for the lightning to look close. Both are wrong. Metal "makes absolutely no difference on where lightning strikes," according to the National Weather Service; height, a pointed shape and isolation decide that¹. And lightning "often strikes more than three miles from the center of the thunderstorm," with bolts from the blue reaching 10 to 15 miles¹.

What actually decides whether a child is safe is time: how long it takes your group to reach shelter, and whether you start moving at the first rumble.

When to leave: the first thunder

Thunder can be heard about 10 miles from the strike³, and lightning can strike as far as 10 miles from any rainfall⁷. Hearing it means you are inside the danger zone, not on the edge of it. The NWS guidance for coaches says it in five words: "If you hear thunder, you are in danger"⁷.

Three distance rules circulate, and they come from different documents:

The 6 mile rules are the minimum, not the target. The NWS cites lightning research showing half of successive flashes are about 9 km apart, and the conclusion that safe distances should be "at least 10 to 13 km (6 to 8 miles)"¹. On a playground, use the first thunder. A busy playground is loud, so do not wait to hear it: NATA advises watching the sky for storms that have not yet produced lightning⁴.

Where to go, and what does not count

The NATA position statement makes a distinction worth memorizing: safe structures are called buildings, and "any structure termed shelter is not safe from lightning"⁴.

That last row matters most to children, because a roofed tower or a tube slide looks exactly like shelter. It is not. NATA's list of mechanisms explains why: side flash, where current jumps from a struck object to a person beside it, causes about 30 to 35% of lightning injuries, and ground current spreading from a strike causes at least half⁴. A child crouched in a plastic tube is still on the ground and right beside the structure, which is exactly where side flash and ground current reach. Crouching does not help either: the NWS says it "doesn't make you any safer outdoors"¹.

The same reasoning rules out the shade canopy. A sun shelter is on NATA's unsafe list by name⁴, and the NWS venue toolkit says picnic shelters are not safe⁸. Shade is a heat control, as shade structures explains, never a storm one. Water belongs on the same list: the NWS says to stay away from water and wet items², and NATA names swimming pools as unsafe⁴, so clear a splash pad at the same time as the equipment.

When to go back out: 30 minutes, and the clock resets

Wait at least 30 minutes after the last thunder heard or lightning seen. Every document read for this page agrees on the number, and the NFHS spells out the part people forget: any thunder or lightning after the count starts "will reset the clock and another 30-minute count will begin"⁵.

Some policies replace the ear with an app. The NFHS says play stays suspended until 30 minutes have passed since the last lightning within 10 miles, but also that sight and sound "should always take precedence" over a mobile app or detection device⁵. The NWS venue toolkit allows an earlier restart, once lightning has moved beyond 8 miles and away, only where a professional meteorologist is reading real time lightning data⁸. A parent or a recess aide is not that person, so use the 30 minutes.

Who gets hurt, and why

From 2006 through 2019, 418 people were killed by lightning in the United States⁶. Almost two thirds were enjoying outdoor leisure, and more than 70% of deaths came in June, July and August. Children's play accounted for 2% of the leisure deaths: few, but not none. The pattern that matters is behavioral. The analysis found many victims were "headed to safety at the time of the fatal strike or were just steps away from safety," and some "even walked outside just before being struck"⁶.

NATA puts the mortality rate at about 8 to 10%, but survivors can be left with memory and attention problems and ongoing headaches⁴.

Recess and school policies

There is no federal recess lightning rule. Districts write their own, and they differ:

The difference between 6 and 10 miles is real. A rule triggered at a 30 second count can leave a class outside while thunder is already audible. For a school playground, the conservative trigger also buys time to move a few hundred children through one or two doors, the peak load problem described in school playgrounds. NATA says the plan must allow for the time it takes everyone to be completely inside⁴. Name the person who makes the call, as both NATA and NFHS direct⁴⁵, and fold it into the staffing plan in supervision. If your state sets recess minutes, as listed in state recess laws, plan an indoor alternative for storm days rather than a shorter wait.

Childcare programs should write the same procedure down: childcare playgrounds covers what licensing visits look for, and records and documentation is where a written lightning plan belongs.

At a park or in the backyard

At a park, the decision is about distance. Before you settle in, note where the nearest safe building is, usually the restroom block, and how far away the car is. The NWS scenario for a Little League game at a park sends everyone to "vehicles or the restrooms," never the dugouts². A tree is the wrong choice even in heavy rain, and that includes the big shade tree over a tree swing. If the forecast calls for afternoon storms, plan the visit for the morning. If you run the park, a sign at the play area naming the nearest safe building is cheap; playground signage covers wording and placement, and park and municipal playgrounds its risk management. The NWS myths page states the principle for adults in charge: "Adults are responsible for the safety of children"¹.

In the backyard the house is the shelter, which makes this the easy case. The mistake is staying out for one more turn on the swing. Bring children in from the playset and the trampoline at the first rumble. Thunderstorm outflow is one of the recorded causes of bounce house wind incidents, which is its own reason to deflate one early; bounce house wind limits has the numbers. Once inside, the NWS says to stay off corded phones and away from plumbing, wiring and windows¹.

If someone is struck

Call 911 and go to the child. The NWS is explicit: "The human body does not store electricity. It is perfectly safe to touch a lightning victim to give them first aid"¹. Most lightning deaths are from cardiac or respiratory arrest at the time of injury⁴, so start CPR at once if the child is not breathing. With several people struck, NATA reverses normal triage: treat first those who appear dead⁴. Move to a safe place as soon as you can, because the storm is still there¹. The rest of the emergency sequence is in first aid and emergencies.

Where this answer stops

This page is about lightning, not every storm hazard. Tornado and severe thunderstorm warnings call for a different response; Kimberly's policy, for example, moves students away from windows and exterior doors to an interior wall¹⁰. Hail, flooding and downed power lines are also outside it; NATA warns rescuers not to touch a casualty who may have been hurt by fallen power lines until the scene is secured⁴.

At night, the NFHS notes that flashes from a distant storm, low on the horizon with no thunder, may not pose a threat⁵. The distance figures here are averages from US guidance; none of the sources set a separate rule for young children, and none tested a specific playground. Wet equipment and puddled surfacing do not change the answer: by then everyone should already be inside. For the other weather checks to run before a visit, see checking a playground as a parent.