Protecting Your Cat from Heatstroke & When to Seek Emergency Vet Care
Heatstroke is a serious, life-threatening emergency in cats that can develop very quickly in warm weather, sometimes in conditions that don't feel extreme to us.
It happens when a cat becomes too hot and cannot reduce its body temperature effectively. Although cats are generally good at finding cool places to rest, they can still develop heatstroke if they become trapped in a hot environment, such as a conservatory, shed, garage or car, or if they are unable to escape the heat. Without prompt treatment, heatstroke can lead to organ failure and, in severe cases, death.
Common symptoms of heatstroke in cats
These are some of the more common signs of heatstroke in cats. If you suspect heatstroke, begin first aid and contact your vet as soon as possible.
Signs of heatstroke in cats can worsen rapidly and may include:
Excessive panting or rapid breathing
Red or pale gums
Confusion or disorientation
Loss of consciousness
Some cats are more susceptible to heatstroke, including brachycephalic (flat-faced) breeds such as Persians, older cats, overweight cats, kittens, cats with underlying health conditions, and those with long or thick coats.
First aid for heatstroke in cats
If you suspect your cat is showing signs of heatstroke, it's important to act quickly, but also to remain calm. Remember, the most effective first aid for heatstroke is to cool your cat down. By following these steps, you can significantly increase your cat's chances of recovery.
If your cat is outdoors, move them indoors to a cool room or into the shade.
Pour or gently sponge cool (not icy) water over their body until they are thoroughly wet. If using a hose, always run the water first to make sure it is cool. Keep water away from their nose and mouth, and do not use ice or ice-cold water, as this can cause blood vessels to constrict and may worsen overheating.
Once they are wet, create a breeze by opening doors and windows or using a fan if you have one.
Offer your cat fresh, cool drinking water if they are alert, but do not force them to drink.
Call your vet as soon as possible
Once you have completed your first aid, it is essential that you go to your nearest vet. Contact them to let them know you have a cat with suspected heatstroke, so they are ready to see your pet as soon as you arrive.
Travel to your vet in a cool, air-conditioned car where possible. If air conditioning is unavailable, keep the windows open to improve airflow while ensuring your cat remains safely secured in their carrier.
Further reading: Transporting Your Pet in an Emergency
How will the vet treat my cat’s heatstroke?
Your vet will focus on reducing your cat's temperature as quickly as possible, using water, fans and, if necessary, a fluid drip. If your cat is so hot that it is struggling to breathe, experiencing seizures or losing consciousness, it may also need oxygen, medication or anaesthesia.
Severe heatstroke can cause other problems that aren't visible, such as problems with blood clotting and damage to internal organs. If your vet believes your cat is showing signs of severe heatstroke, they may need to run some blood tests to check that their internal organs are working properly. In these circumstances, your cat may need to stay in hospital to be monitored and receive medication.
Health outlook for your cat after heatstroke
If your cat suffered mild heatstroke and was cooled down quickly, it is unlikely to have any lasting problems and will probably recover fully. If, however, it had severe heatstroke and, as a result, had some organ damage or treatment was delayed, then recovery is much less likely.
Tips to prevent heatstroke in cats
Make sure your cat always has access to a cool, shaded area, both indoors and outside.
Ensure your cat always has fresh, cool drinking water available.
Never leave your cat in a car or a hot room (e.g. conservatories).
Keep your home as cool as possible during hot weather by closing blinds or curtains during the hottest part of the day.
Groom long-haired cats regularly to help prevent their coat from trapping excess heat.
Maintain a healthy body weight, as overweight cats are more susceptible to heatstroke.
Always check sheds, garages, conservatories and greenhouses before closing them to make sure your cat has not become trapped inside.
Written by Gillian Burkhill, Veterinary Surgeon, Animal Trust Vets CIC | Published July 2026 | Review date July 2029 | This advice is for UK pets only and is not a replacement for seeing a vet