How long can a dog stay in a parked car?
Updated By PetymFacts checked against official sources on
Quick answer
On a warm day, no length of time is safe. A parked car heats up fast, with most of the rise in the first 15 to 30 minutes, and opening the windows a little makes almost no difference. In Indian summer and humid monsoon weather, take your dog with you or leave it at home. Never leave it in a parked car.
If you see a dog in a hot car and it is panting hard, drooling, weak or collapsed, treat it as an emergency: find the owner fast, call the police, and once the dog is out, cool it with tap water and get it to a vet.
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I can see a dog in a hot car. What do I do now?
Look at the dog first. What you see decides how fast you act.
If The dog is panting heavily, drooling, vomiting, confused, weak or collapsed
This is an emergency. Call the police straight away, ask people nearby to help find the owner, and tell the police what you see. Heatstroke can move quickly to seizures, organ damage and death. PDSA
If The dog seems fine for now
Note the car's registration number and how long it has been there. Ask the shop, mall or society security to announce it and find the owner. Stay with the dog and watch it; if it gets worse, call the police. RSPCA (England and Wales)
If You are thinking of breaking a window
Tell the police what you plan to do and why before you act, take photos or video, and note the names and numbers of witnesses. Whether forcing entry is lawful depends on the facts; the police can help you get the dog out. RSPCA (England and Wales)
If The dog is out of the car and overheated
Move it into shade or a cool room and pour cool tap water over its whole body, keeping water away from its nose and mouth. Do not cover it with a wet towel, which traps heat. Then call or go to the nearest vet. PDSA
How hot does a parked car get?
Hotter and faster than most people expect, even when the day does not feel very hot.
Researchers at Stanford parked a dark car in the sun on 16 clear days with outside temperatures of 22 to 36 °C and measured how hot the inside got over an hour. About 80% of the rise happened in the first 30 minutes. Even on the coolest day, the inside reached about 47 °C, and leaving the windows open about 4 cm did not meaningfully slow the heating or lower the peak.
The RSPCA gives the same picture for dogs: at 22 °C outside, a car can reach an unbearable 47 °C within an hour. Indian summer afternoons are far hotter than 22 °C. IMD declares a heat wave in the plains when the maximum reaches 40 °C or more and is well above normal, and its heat wave advice says plainly: do not leave children or pets in parked vehicles.
| What | The rule | Source |
|---|---|---|
| Share of the rise in the first 30 minutes | About 80% | Pediatrics (2005)study |
| Inside temperature after an hour, coolest day tested (22 °C outside) | About 47 °C | Pediatrics (2005)study |
| Effect of windows open about 4 cm | No meaningful difference to the rise or the peak | Pediatrics (2005)study |
| IMD heat wave threshold for the plains | A maximum of 40 °C or more, well above normal | India Meteorological Department |
Is it all right for just five minutes?
No. The common reasons for leaving a dog in the car do not hold up.
You may have read
Five minutes while I pay for the petrol is fine.
Myth
What the sources say
PDSA's advice is never to leave a dog in a car on a warm day, not even for a few minutes. Queues and errands also take longer than planned. PDSA
You may have read
I parked in the shade with the windows down.
Myth
What the sources say
The RSPCA says many people wrongly believe shade or open windows make it safe. In the Stanford measurements, windows open about 4 cm made no real difference. RSPCA (England and Wales)
You may have read
It is only 25 °C today, so the car will stay cool.
Myth
What the sources say
The car in the study reached about 47 °C inside on a 22 °C day. The rise comes from sun through the glass, not just the air outside. Pediatrics (2005)study
You may have read
I left the engine and AC running.
Myth
What the sources say
IMD's heat wave advice makes no exception for a running engine: do not leave children or pets in parked vehicles. Do not stake your dog's life on a car staying switched on. India Meteorological Department
You may have read
Dogs only get heatstroke in cars.
Myth
What the sources say
In a large UK study, vehicles caused about 5% of heat-related illness and exercise about 74%. The midday walk is a risk too, but a car is one of the easiest to avoid. Animals (2020)study
What are the signs of heatstroke in a dog?
PDSA groups the signs from mild to severe. Any of the moderate or severe signs means a vet now.
- Mild: heavy panting, fast or difficult breathing, low energy. PDSA
- Moderate: drooling or foaming at the mouth, vomiting, diarrhoea, very red or very pale gums, shaking, weakness and collapse. PDSA
- Severe: confusion, seizures, unconsciousness, vomiting or diarrhoea with blood. PDSA
- Higher risk: flat-faced breeds such as Pugs, Shih Tzus and French Bulldogs had higher odds of heat-related illness in the UK study. Animals (2020)study
- AWBI's heat advisory lists excessive panting, lethargy, drooling, rapid heartbeat and collapse, and asks for immediate veterinary attention. Animal Welfare Board of India
Is leaving a dog in a hot car against the law in India?
There is no rule that names cars, but the duty of care in the cruelty law applies.
The Animal Welfare Board of India's heat circular of 2026 reminds owners that under section 3 of the Prevention of Cruelty to Animals Act, 1960, every person in charge of an animal must take all reasonable measures to ensure its well-being and prevent unnecessary pain or suffering, and that failing to do so is an offence under section 11(1). Section 11(1) of the Act covers, among other things, treating an animal so as to subject it to unnecessary pain or suffering. Whether a particular case is an offence is for the police and the courts. This is general information, not legal advice, checked on 21 October 2026.
How do I run errands or travel with a dog in summer?
Do
- Leave the dog at home in the coolest room, with water in bowls that cannot tip over, if you are going somewhere it cannot come in. Animal Welfare Board of India
- If the dog must travel, use an air-conditioned car, or one with the windows open enough for air but not for escape. PDSA
- On road trips, plan stops where the dog can come out with you into shade, and travel in the cooler early hours. India Meteorological Department
- Ask a friend, a walker or a sitter to look after the dog when your errand is at a place dogs cannot enter. PDSA
Don’t
- Leave the dog in the car while you shop, eat, visit a temple or wait for a train, even in the parking shade. RSPCA (England and Wales)
- Rely on cracked windows. They do not keep the car cool. Pediatrics (2005)study
- Leave children or pets in parked vehicles during hot weather, as IMD's heat wave advice says. India Meteorological Department
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- A photo every day
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Questions owners ask
Can I leave my dog in the car in winter?
- A cool, cloudy day is much less risky than summer, but sunshine through the glass still heats a car quickly: the Stanford study measured about 47 °C inside on a 22 °C day. Never leave a dog for long, take the keys and check often, and in most of India for most of the year, simply do not.
Does leaving the windows open make it safe?
- No. In measurements of a parked car in the sun, opening the windows about 4 cm made no meaningful difference to how fast the inside heated or how hot it got. The RSPCA says shade and open windows are a common, wrong reason people think it is safe.
Who do I call if I see a dog locked in a hot car in India?
- Try to find the owner first through the shop, mall or society security, and call the police if the dog shows signs of heatstroke such as heavy panting, drooling, weakness or collapse. Tell the police what you see and anything you plan to do, and take photos and witness names.
How fast can a dog get heatstroke in a car?
- Quickly. Most of a parked car's temperature rise happens in the first 15 to 30 minutes, and PDSA warns that heatstroke can progress very fast to seizures, organ damage and death. Flat-faced breeds, puppies, old dogs and dogs with breathing problems are at the greatest risk.
What should I do after rescuing an overheated dog?
- Move it into shade or a cool room and pour cool tap water over its whole body, keeping water away from the nose and mouth. Do not wrap it in a wet towel, which traps heat. Then take it to the nearest vet, even if it seems to recover.
Keep reading
- Heatstroke in dogsSigns, cooling first aid and when to go to the vet.
- How do I keep my dog cool in a power cut?
- How hot is too hot to walk a dog?
- Can I take my dog in a cab?
- Road trips with a pet
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Sources
Each source was opened and read on the date shown. How Petym checks its sources
- RSPCA (England and Wales): Dogs die in hot cars (opens in a new tab)
- PDSA: Heatstroke in dogs (opens in a new tab)
- India Meteorological Department: FAQ on heat wave (opens in a new tab)
- Animal Welfare Board of India: Request to ensure care and protection of animals from direct heat during extreme hot weather (4 May 2026) (opens in a new tab)
- Animal Welfare Board of India: The Prevention of Cruelty to Animals Act, 1960, as amended in 1982 (AWBI's copy) (opens in a new tab)
- Pediatrics (2005): Heat stress from enclosed vehicles: moderate ambient temperatures cause significant temperature rise (abstract read) (opens in a new tab)
- Animals (2020): Dogs don't die just in hot cars: exertional heat-related illness (opens in a new tab)