| In short : Heatstroke in dogs is a absolute veterinary emergency. Unlike humans, the dog does not sweat through the skin; It regulates its body temperature mainly by panting. When the outside temperature is too high or too humid, this system sucks and its internal temperature can quickly exceed 40°C to 41°C (beyond its normal temperature of 38.5°C), resulting in irreversible organic damage or death a few tens of minutes. Faced with this situation, every second counts: – Recognize the signs: A frenetic and noisy panting, hypersalivation (abundant and thick drool), bright red or purplish mucous membranes, a staggering gait and extreme abatement are the first symptoms. – The word order: cool gradually. It is necessary to lower the temperature of the dog immediately, but in a controlled way to avoid a thermal shock (cardiac arrest). – The fatal error: icy water. Never immerse the dog in ice water and do not dress it in ice cubes. Use lukewarm or cool water. – Contact the veterinarian: Even if the dog seems to recover thanks to your first gestures, an emergency consultation remains essential to check the condition of its vital organs. |
Every summer, the dramas repeat themselves: a dog left “only 10 minutes” in a car parked in the shade, a ball throwing session in the middle of the afternoon, or a walk on a burning asphalt. By car, even with the windows ajar, the cabin can turn into a real furnace and reach 50°C in a quarter of an hour when the outside temperature is close to 25°C.
Knowing how to identify a heatstroke and immediately applying the right thermal resuscitation gestures saves the life of your companion before arriving at the veterinary clinic. Here is the emergency protocol to follow step by step.
1. Heatstroke Symptoms
The earlier the heatstroke is taken care of, the higher the chances of survival without sequelae. Clinical signs are changing rapidly:
Start phase (alert)
- Excessive panting: The dog gasps very quickly, hard and uninterrupted. The tongue is fully out and very red.
- Hypersalivation: A fluffy, thick and abundant drool flows from its mouth.
- agitation: The dog seems panicked, searches for shadow or fresh soil frantically.
Advanced phase (critical distress)
- Color change of mucous membranes: The gums and the inside of the lips go from pink to dark red, then to blue/purple (cyanosis, a sign of a lack of oxygen).
- Motor disorders: The dog wobbles, its paws flex (loss of balance) and it struggles to stand up.
- Digestive disorders: Vomiting or diarrhea may occur.
- Ultimate stage: Loss of consciousness, seizures, coma.
2. The first aid protocol: the actions to do
If you suspect heat stroke, don’t wait to get in the car to go to the vet: Start cooling on site, because every minute spent at a temperature of 41°C destroys the dog’s brain cells.
Step 1: Subtract the dog from the heat source
Immediately move the animal to a cool, shaded and well-ventilated place (a room with air conditioning or fan, or failing that, the shadow of a tree).
Step 2: Cool gradually (gold ruler)
The goal is to bring down the body temperature without causing sudden vasoconstriction (which would block the heat inside the body).
- THE TECHNIQUE: Wet the dog using a shower or wet towels with llukewarm water at the beginning, then cool (about 20°C).
- The meaning of application: Start with the ends (the pads, the legs), then gradually rise towards the belly, the inside of the thighs, the neck and finally the back.
- Ventilation: Place a fan facing the wet dog to accelerate water vaporization, which artificially reproduces the effect of perspiration.
Step 3: Suggest water
If the dog is fully conscious, offer him fresh (not chilled) water in small quantities. Never force An unconscious or semi-conscious dog to drink, because the water would infiltrate into its lungs.
Summary table: saving gestures vs fatal errors
| what absolutely must be done | What should never be done (danger of death) |
| Place the dog in shadow and in front of a fan. | Leave the dog in full sun or in an enclosed space. |
| Wet the dog gradually from bottom to top with cool water. | Immerse the dog in ice water or use ice cubes (thermal shock). |
| Put wet and cool cloths on her neck and belly. | Cover the dog with a wet towel without renewing it (Hot hot water effect). |
| Take its rectal temperature regularly during the process. | Stop cooling only when the panting stops. |
3. Post-crisis: the role of the veterinarian
While you are chilling the dog, ask a loved one to contact the emergency veterinary clinic to announce your arrival.
When to stop cooling? If you have a rectal thermometer, stop cooling efforts as soon as the dog’s temperature drops to 39.3°C. If you continue beyond, you risk turning the dog into severe hypothermia, with its internal regulating system being temporarily damaged.
Once at the veterinarian, the animal will be placed on a perfusion to rehydrate its organs and stabilize its tension. The doctor will perform blood tests to ensure that heat stroke has not triggered acute renal failure, clotting disorders (CIVD) or cerebral edema.
FAQ: Your Frequently Asked Questions
Which breeds are most sensitive to heatstroke?
Dogs brachycephalic (flat-faced) like the French Bulldog, the English bulldog, the Pug, the Boxer or the Shih Tzu are extremely vulnerable. Their airways being anatomically narrowed, their panting is much less effective in evacuating heat. Older, overweight, cardiac, or black and very thick coats (like Newfoundland) also fall into the high-risk category.
What if I see a dog locked in a car in full sun?
If the owner is untraceable and the dog shows signs of distress (extreme panting, lethargy):
- Immediately call the police (police or gendarmerie at 17).
- If the situation is critical and the emergency services delay, article 122-7 of the Penal Code (state of necessity) authorizes you to break a window to save the animal. It is strongly advised to surround yourself with two witnesses and to take photos/videos of the state of the dog before acting to protect you from any further complaint for degradation.
Can a swim in summer cause heatstroke?
Yes, if the effort is too intense. Running a dog after a frisbee or a beachfront ball under a blazing sun, even if it goes in the water between two throws, can trigger heatstroke. Intense physical exercise produces an enormous amount of internal heat that tempered water is not always enough to dissipate, especially if the ambient air is hot and humid.