Hot Cars: Ten Minutes, and It Is Not Only About Being Forgotten

If a child is alone in a parked car, call 911 immediately and stay with the car. Do not leave to find the owner. Tell the dispatcher what you can see and follow their instructions exactly — they will tell you what to do next, including how to get the child out.

The National Weather Service puts the number at ten minutes — a child in a parked car “can die in 10 minutes.”

Ten. Not an afternoon, not an hour, not the length of a shop. That figure is the reason a bystander should call before doing almost anything else, because there is no version of this where finding the right adult first is fast enough.

And the Weather Service reports that 31 children died in hot cars in 2025.

The part of this story that gets told least

Most coverage of hot-car deaths is about a parent who forgot. That happens, it is devastating, and it is not the whole picture.

The Weather Service names the other route explicitly: “Kids may play in cars or wander outside and get into a car.”

The child let themselves in. Nobody forgot anybody. A toddler followed a sibling, or went out to fetch something, or simply found an unlocked door interesting — and then could not work out how to open it from the inside, or could not reach, or panicked.

Which produces a prevention step almost nobody takes, and it costs nothing: lock the car when it is empty. Not to stop theft. To stop entry. Keys and fobs go somewhere a child cannot reach, and if a child is missing, the car is one of the first places to look, not one of the last.

If you find a child alone in a car

Call 911 first. Not after trying the doors, not after looking for the driver, not after deciding how bad it looks.

Stay with the car. You are the person who knows which car, and you are the person watching for a change in the child.

Tell the dispatcher what you can see — whether the child is responsive, whether they are sweating, whether they are crying or quiet. A child who has gone quiet is not a child who has settled.

And follow the dispatcher’s instructions. People ask whether they should break a window, and that is a question for the dispatcher rather than for a web page. They know what is on the way and how long it will be, they can authorise and direct what you do, and they will stay on the line while you do it. This page is not going to publish a rule that might be wrong for your particular ten minutes.

Why the usual reassurances do not apply here

A window cracked open does not fix this. Neither does shade that was shade when the car was parked and moved with the sun. Neither does a short errand that became a long one, which is how most of these begin.

And a child is not a small adult in this situation. A smaller body gains heat faster and has less reserve, which is the same arithmetic behind every other heat page on this site — it is just compressed into minutes by an enclosed space.

Pets are the same problem and the same call. A dog cannot sweat its way out of a parked car either.

Afterwards, even if they seem fine

Any child who has been shut in a hot car should be assessed, including one who is crying, alert, and apparently back to themselves once out in the air.

The reason is the one that runs through all of our heat writing: the body’s temperature is the thing that matters, and how a child looks in the first minutes afterwards is not a reliable measure of it. Confusion, drowsiness, vomiting, a seizure, or skin that has gone hot and dry are all reasons to call 911 rather than to drive anywhere.

Call 911 for a child who is drowsy, confused, limp, vomiting, seizing, or not fully alert.

Come to an emergency room for a child who was shut in a hot car and is now alert — to be checked properly, because “seems fine” and “is fine” are not the same finding in a heat emergency.

Our emergency rooms are open every hour of every day and are walk-in. Go to the nearest one, and if another emergency department is closer to you, that one is the right answer.

If you are unsure, come in — this list is not exhaustive and you are not expected to assess a child’s temperature regulation yourself.

Questions people actually ask

The parent came back while I was on the phone. Should I hang up? No. Let the dispatcher decide what happens next. You do not have to manage the conversation with the driver, and you are not required to have judged the situation correctly.

It was only going to be two minutes. The Weather Service’s figure is ten minutes to death, and the errands that become dangerous are the ones that were going to be short. There is no length of time this page is going to endorse.

My child got into the car by themselves and was only in there briefly. Get them checked, and then move the keys. The Weather Service names this as one of the ways it happens, which means it is a known pattern rather than a freak event.

Is a cracked window enough? No.

Should I break the window? Ask the dispatcher, who can authorise it and direct you. Call first.

What if I am wrong and the child is fine? Then you called 911 about a child who turned out to be fine, which is the correct outcome. The other way of being wrong takes ten minutes.

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Call 911 immediately, stay with the car, and follow the dispatcher. Any child who has been shut in a hot car should be assessed even if they seem fine — both of our emergency rooms are open 24 hours a day, every day of the year, walk-in, with no appointment and no referral. Find your nearest emergency room →

Related reading: heat exhaustion or heat stroke · checking on someone over 65 in a heat wave

Sources

18. Heat Safety — National Weather Service, National Oceanic and Atmospheric Administration. https://www.weather.gov/safety/heat

This article is general information, not a diagnosis. If you are unsure, come in — this list is not exhaustive and you are not expected to assess a child yourself. If it might be an emergency, treat it as one and call 911.