Signs Your Dog is Overheating in Summer (+ How to Cool Them Fast) 2026
Share
Signs Your Dog is Overheating in Summer (+ How to Cool Them Fast)
Summer is one of the most dangerous seasons for dogs. Unlike humans, dogs cannot sweat through their skin — they regulate body temperature almost entirely through panting. When the heat becomes too intense, their cooling system fails fast, and heatstroke can set in within minutes.
Knowing the early warning signs of overheating could save your dog's life. This guide covers every symptom to watch for, what to do immediately, and how to prevent heat-related illness before it starts.
Why Dogs Overheat Faster Than You Think
Dogs have a normal body temperature between 101°F and 102.5°F (38.3°C–39.2°C). When their temperature rises above 104°F (40°C), they are in danger. Above 106°F (41°C), organ damage and death can occur rapidly.
Several factors make dogs especially vulnerable in summer:
Thick coats trap heat and block airflow from reaching the skin.
Flat-faced breeds (Bulldogs, Pugs, French Bulldogs) have narrow airways that make panting far less effective at releasing heat.
Older dogs and puppies have weaker temperature regulation systems than healthy adult dogs.
Overweight dogs generate more body heat and struggle more to cool down.
Hot pavement and direct sunlight accelerate heat absorption through paws and fur.
Even a short 10-minute walk on a hot afternoon can push a vulnerable dog into dangerous territory.
7 Warning Signs Your Dog is Overheating
- Excessive, Heavy Panting
Panting is normal, but overheating panting looks different — it is louder, faster, and more desperate. The tongue may hang far out and appear wider than usual. If your dog cannot seem to catch their breath, this is a red flag.
- Drooling More Than Usual
Thick, sticky saliva or excessive drooling is a common early sign. As dehydration sets in, saliva becomes even thicker and foamy. If you notice drool pooling on the floor or your dog's chest, act immediately.
- Bright Red Gums and Tongue
Lift your dog's lip and look at their gums. Healthy gums are pink and moist. Overheated gums turn bright red or dark, and they may feel dry or tacky rather than slippery. This is a serious warning sign.
- Lethargy and Weakness
A dog that is suddenly sluggish, wobbly on their feet, or reluctant to move may be suffering from heat exhaustion. If your normally energetic dog lies down and refuses to get up during or after outdoor activity, take it seriously.
- Vomiting or Diarrhea
When body temperature rises dangerously, the digestive system is affected first. Vomiting and diarrhea — sometimes with blood — can occur during heatstroke. This signals the body is under severe stress.
- Glazed or Unfocused Eyes
Watch your dog's eyes. A confused, distant, or glassy stare — especially combined with other symptoms — indicates the brain is being affected by heat. This is a medical emergency.
- Collapse or Seizures
In severe cases, dogs collapse, lose consciousness, or have seizures. If this happens, begin cooling immediately and rush to a veterinarian without delay.
What to Do If Your Dog is Overheating
Act immediately — every minute matters.
Step 1 — Move them to a cool area Get your dog out of the sun and into a shaded or air-conditioned space right away.
Step 2 — Offer cool (not cold) water Let your dog drink small amounts of cool water. Do not force water into their mouth, and avoid ice-cold water — sudden temperature drops can cause shock.
Step 3 — Apply cool water to their body Wet their paws, neck, armpits, and groin with cool water. These areas have large blood vessels close to the skin and cool the blood fastest. Do not use ice or extremely cold water.
Step 4 — Use a cooling mat Place your dog on a ShappyDay Instant Relief Summer Cooling Mat (https://www.shappyday.com/products/instant-relief-summer-mat-for-dogs-cats) immediately. The pressure-activated gel inside absorbs body heat without needing water, electricity, or refrigeration. It activates the moment your dog lies down and provides continuous cooling relief — perfect for fast response in a hot environment.
Step 5 — Fan them gently Use a hand fan or electric fan to increase airflow over their damp coat. This accelerates the cooling process through evaporation.
Step 6 — Check temperature and call your vet If you have a rectal thermometer, check their temperature every few minutes. Once it drops below 103°F (39.4°C), stop active cooling to avoid hypothermia. Always call your vet even if your dog seems to recover — internal damage may not be immediately visible.
How to Prevent Overheating Before It Starts
Time your walks wisely. Walk your dog early morning (before 8am) or after sunset when pavement and air temperatures are lower. The "7-second rule" — press the back of your hand to the pavement for 7 seconds — tells you if it is too hot for paw pads.
Always provide fresh water. Keep multiple water bowls available indoors and bring a portable water bottle on every outing. Dehydration accelerates overheating significantly.
Never leave your dog in a parked car. Even on a mild 70°F (21°C) day, a car interior can reach 104°F (40°C) within 30 minutes. This is one of the leading causes of canine heatstroke.
Provide a dedicated cool resting spot. Set up a shaded, ventilated area where your dog can retreat during the hottest parts of the day. A ShappyDay Instant Relief Summer Cooling Mat (https://www.shappyday.com/products/instant-relief-summer-mat-for-dogs-cats) placed in this spot gives your dog a self-cooling surface they can use any time they feel warm — no setup required, no electricity, no water.
Limit exercise on hot days. On days above 80°F (27°C), reduce outdoor activity significantly. Short bathroom trips, indoor play, and mental stimulation games are safer alternatives.
Keep coats trimmed (but not shaved). For long-haired breeds, a summer trim reduces heat trapping. However, never shave a double-coated dog — their undercoat actually insulates against heat and protects against sunburn.
Which Dog Breeds Are Most at Risk?
While any dog can overheat, these breeds need extra vigilance in summer:
Brachycephalic breeds including French Bulldogs, Pugs, Bulldogs, Boston Terriers, and Shih Tzus are at the highest risk due to their narrow airways.
Heavy-coated breeds such as Huskies, Malamutes, Samoyeds, and Chow Chows retain heat far more than short-haired breeds.
Large and giant breeds like Saint Bernards, Newfoundlands, and Bernese Mountain Dogs generate more body heat and cool more slowly.
Senior dogs aged 7 years and older and puppies under 6 months both have less efficient temperature regulation.
Dogs with existing heart or respiratory conditions are especially vulnerable and need extra monitoring.
If your dog falls into any of these categories, a cooling mat is not optional — it is essential summer equipment.
The ShappyDay Instant Relief Summer Cooling Mat
The ShappyDay Instant Relief Summer Cooling Mat (https://www.shappyday.com/products/instant-relief-summer-mat-for-dogs-cats) is designed specifically for dogs and cats that need reliable, instant cooling during summer. Here is why pet owners trust it:
Pressure-activated gel starts cooling the moment your pet lies down — no pre-chilling needed.
No water, electricity, or refrigeration required — works anywhere, anytime, indoors or outdoors.
Foldable and portable — take it on road trips, to the beach, or the backyard.
Easy to clean — simply wipe down with a damp cloth after use.
BPA-free, non-toxic materials — completely safe for dogs and cats who chew or lick.
Whether your pet is recovering from a hot walk or just needs a cool place to nap through a summer afternoon, the ShappyDay mat provides consistent, safe relief all season long.
Final Thoughts
Summer should be an enjoyable season for you and your dog — but only if you stay aware of the risks. Overheating can escalate from mild discomfort to life-threatening heatstroke in under an hour. By knowing the signs, responding quickly, and taking simple preventive steps, you can keep your dog safe and comfortable all season long.
Start with the basics: cool water, shade, limited midday activity, and a reliable cooling mat within reach. Your dog will thank you for it.
Browse our full range of pet wellness products at ShappyDay (https://www.shappyday.com).