Dogs Overheat Faster Than You Think
A dog left in a parked car on a 22°C day can face internal temperatures exceeding 47°C within an hour. But heatstroke does not only happen in cars. Garden sun, pavements that scorch paw pads, and even enthusiastic play on a warm afternoon can push a dog's core temperature into dangerous territory. Unlike humans, dogs cannot sweat across their skin — they rely almost entirely on panting to dissipate heat, which is a far less efficient system. Understanding this biology is the starting point for keeping your dog genuinely safe through summer.
Recognising Heat Stress Before It Becomes Heatstroke
Early signs of overheating include excessive panting, drooling, restlessness, and a reluctance to move. As the condition worsens, you may see vomiting, bright red gums, stumbling, or collapse. If you notice any progression beyond heavy panting, move your dog to a cool area immediately, apply cool (not iced) water to the groin, armpits and neck, and contact your vet without delay. Heatstroke is a veterinary emergency.
Flat-faced breeds such as Bulldogs, Pugs, and French Bulldogs are at significantly higher risk due to restricted airways. Elderly dogs, overweight dogs, and those with heart or respiratory conditions also require extra caution during warm months.
Cooling Your Home Environment
Fans and Airflow
Fans do not cool air the way air conditioning does — they work by moving air across the skin to accelerate evaporation. For dogs, this means a fan is most useful when your dog is damp. A cool, wet towel laid down near a fan can lower the ambient temperature noticeably. Position fans to draw hot air out of a room rather than simply circulating it.
If you do not have air conditioning, close blinds on south-facing windows during peak hours (roughly 11am to 4pm in the UK summer) and open windows at night to flush heat out. Tiled floors and cool hallways make natural resting spots — let your dog choose where to lie rather than confining them to a warm room.
Cooling Mats
Gel-filled cooling mats work via pressure activation or self-cooling materials that absorb body heat. They are a low-effort, effective option for dogs who will tolerate lying on them. Place the mat in a shaded area rather than in direct sunlight, where it will warm up and defeat the purpose. Introduce the mat indoors first — some dogs are initially suspicious and benefit from a treat or two placed on the surface to encourage use.
Water-Based Cooling: Paddling Pools and Wet Coats
A shallow paddling pool in the garden is one of the most effective and enjoyable cooling tools available. You do not need depth — a few centimetres of cool water for a dog to stand in is sufficient to lower body temperature quickly, as blood vessels near the paws help dissipate heat. Choose a shaded spot and refresh the water daily to prevent bacterial growth.
Not all dogs take to water immediately. Encourage hesitant dogs by stepping in yourself, tossing a favourite toy into the water, or letting them observe other confident dogs. Never force a dog into water — it creates negative associations and increases stress, which itself raises body temperature.
Wetting the paws, belly and groin with cool water is highly effective even without a pool. A damp bandana around the neck or a wet cooling vest can extend this effect during short walks.
Exercise and Walk Timing
The seven-second pavement test is worth knowing: place the back of your hand on the pavement for seven seconds. If you cannot hold it there comfortably, it is too hot for your dog's paws. As a rule, avoid walks between 11am and 5pm on warm days. Early morning and evening outings are cooler and more comfortable for both of you.
Keep summer walks shorter and slower. A dog does not need a six-kilometre run in July — a calm morning walk followed by indoor enrichment, scatter feeding, or a frozen food toy provides mental stimulation without the physical heat load.
Hydration: More Important Than It Sounds
Dogs should always have access to fresh, clean water, but in summer this needs active management. Water heats up quickly in direct sunlight, and many dogs will refuse warm water. Offer multiple water stations around the house and garden. Adding ice cubes prolongs coolness and many dogs enjoy them as a novelty.
Frozen treats — blended watermelon and water, plain yoghurt in an ice cube tray, or a frozen Kong filled with wet food — serve double duty as enrichment and hydration support. Always check that any ingredients are dog-safe before preparing them, and consult your vet if your dog has dietary restrictions.
Summer Safety in Practice: A Quick-Action List
- Walk before 10am or after 6pm on warm days
- Test pavement temperature before any walk
- Ensure shade and cool water are available at all times outdoors
- Set up a paddling pool or cooling mat in a shaded area
- Dampen paws and belly before and after outdoor time
- Use a fan alongside a damp towel or cooling vest for indoor relief
- Monitor flat-faced, elderly, or overweight dogs especially closely
- Know the signs of heatstroke and have your vet's number to hand
If you are ever uncertain whether your dog is overheating, err on the side of caution and contact your vet. Heat-related illness can escalate quickly, but with the right preparation it is largely preventable.