Vets have warned that extreme temperatures are causing heatstroke in pets even when they are kept indoors or in gardens, as the UK experiences its third heatwave of the year. While heatstroke in animals used to be mainly linked to exercise or being left in hot cars, cases are now occurring in animals simply resting at home.
Dr Katharine Nelson, director of general practice at the Royal Veterinary College, said that during recent heatwaves, cases have increased when dogs have been allowed to wander in gardens or have become stressed during travel. Dave Martin, a vet and head of welfare at Inspiring Vet Care, noted that people are aware of obvious risks but are being caught out by less obvious ones, such as dogs overheating in sunny gardens or cats trapped in greenhouses.
Inspiring Vet Care reported dealing with 355 suspected heatstroke incidents in 2025, a 28% increase compared with 2024, with 66% occurring in summer. Flat-faced breeds, thick-coated animals, and those with respiratory or heart problems are particularly at risk. Signs include heavy panting, confusion, lethargy, and vomiting.
Vets advise keeping homes cool by closing curtains and windows during the day, and postponing walks in extreme heat, replacing them with mental stimulation indoors. Cats should avoid stressful travel; if necessary, use a well-ventilated carrier with a damp towel in an air-conditioned vehicle. Owners should provide plenty of water, use fans, and wet pets to help them cool down.
