Why You Should Never Leave Your Pet in the Car
June 22, 2026
This week in Greater London, temperatures are forecast for around 29 – 36°C, which is why we’re re-sharing some of our top advice articles on how to avoid heatstroke in pets. As always, we’re here if you need us in an emergency or for general advice and pet care – call 0208 943 2303.
Did you know a parked car can reach internal temperatures of up to 50-60°C in summer? Even on a mild day in Greater London, a car left in the sun can become dangerously hot within minutes, putting your cat or dog’s life at risk.
Below, Darren Partridge at Alpha Vets explains what every pet owner needs to know about travelling with a cat or dog, and how to keep your pet protected.
Book an appointment if you’d like tailored guidance on heat and travel safety for your pet.
Why a hot car is never safe for your pet
Our veterinary team at Alpha Vets sees the consequences of heat-related illness every summer. Even in Greater London on days that don’t feel particularly hot, the risk is very real — when outside temperatures reach just 24°C, the interior of a parked car can climb to 38°C within ten minutes.
Unlike humans, pets cannot sweat to regulate their temperature, and panting becomes far less effective in a hot, confined space. Even a quick stop at the petrol station or supermarket can quickly become dangerous.
Which pets are most at risk of overheating?
All cats and dogs are vulnerable to heat in a confined space, but some are more susceptible than others.
Older pets, overweight pets, and pets with underlying health conditions struggle to regulate their temperature and can deteriorate faster. Puppies and kittens are also at higher risk, as their bodies are less equipped to handle sudden changes in temperature.
Regardless of age, breed or health status, no pet should ever be left alone in a car. If you’d like advice on travelling safely with your pet, get in touch with our veterinary team in Teddington.
What to do if you see a pet in a hot car
The legal context
In the UK, leaving a pet in a hot car can constitute an offence under the Animal Welfare Act 2006. The RSPCA and police have the power to act if a pet is found to be suffering and owners can face prosecution.
Emergency steps for the public
As a member of the public, you do not have the right to break into a vehicle. If you believe an animal’s life is in immediate danger, please follow these steps:
- Call 999 first and note the registration plate.
- Alert nearby businesses and ask staff to make an announcement to help locate the owner.
- Stay with the pet until help arrives.
Get in touch with our team if you have any concerns about your own pet’s wellbeing following a journey.
Safer alternatives to leaving your pet in the car
The simplest solution is to leave your pet at home where possible. If they do need to travel, we recommend bringing someone along who can stay with them while you stop. For longer journeys, plan pet-friendly rest stops in advance and ensure the car is well ventilated throughout.
If travel is unavoidable, our team at Alpha Vets can provide tailored advice on keeping your pet safe and comfortable on the road.
Darren reminds pet owners in Greater London that a little planning goes a long way. Your pet’s safety is always worth the extra thought this summer.
Find out more about our services at any time.
