Overheating in dogs is not something to take lightly. As the weather heats up, it's important to remain aware of how the heat affects your pup. Heat exhaustion in dogs can lead to serious and potentially fatal conditions such as heat stroke and cardiac arrest. To help keep your dog safe and cool during the summer, here is the lowdown on signs that he's overheating and how to prevent it: hint, a little water does wonders for keeping your pup cool.
Heat Exhaustion and Heat Stroke
Unlike people, dogs don't sweat out excess body heat. While your dog does have a few sweat glands located in his paws, these do little to help regulate his body temperature. Instead, he does this through rapid, open-mouthed breathing, called panting. But sometimes panting isn't enough to keep him from getting overheated.
Heat exhaustion in dogs can occur when the body temperature becomes elevated above the normal temperature. This varies slightly, according to PetMD.com, but it's generally agreed that temperatures of 103 degrees Fahrenheit and higher are above normal. If the temperature continues to rise and reaches 106 or higher, your pup is in the danger zone for heat stroke, during which the organs begin to shut down and his heart could stop altogether.
Warning Signs
Fortunately, it's not difficult to spot signs of overheating in dogs. Excessive panting is the first symptom. A dangerously overheated dog, according to the American Kennel Club Canine Health Foundation, may collapse or experience convulsions, exhibit vomiting or diarrhea, and may also have gums or a tongue that turn blue or bright red. You may want to identify the problem before it gets that severe, though to intervene and prevent serious overheating. Early signs are more subtle - it may be as simple as your dog seems less responsive to commands than usual. When you call his name, instead of turning to look at you, he may wander away. If there is any question at all, get your dog out of the heat. The Humane Society of the United States adds that signs of potential heat stroke include glazed eyes, excessive drooling, a rapid heart rate, dizziness or lack of coordination, fever, lethargy, and loss of consciousness.
Risk Factors

While all dogs are at risk for overheating if the conditions are right, some breeds are more prone to it than others. This includes dogs with thick coats or long hair, very young or very old dogs, and brachycephalic breeds—those with short noses and flat faces, such as shih tzus, pugs, boxers, and bulldogs. Overweight dogs and those that suffer from medical conditions that cause difficulty breathing or heart problems are especially susceptible.
Extremely active dogs and working or hunting breeds (such as shepherds, retrievers, and spaniels) are also at a higher risk, especially during warm months. You should be careful to not push these dogs too hard, so make sure they get plenty of breaks to rest in the shade and that they are well-hydrated at all times.
Environmental factors can also place a dog at risk. Be aware not just of high temperatures, but also of high humidity, which can increase the chance of heat exhaustion in dogs. All dogs are at increased risk of overheating if they're not given adequate shade or another cooler place to relax indoors. And dogs left in a hot car are in serious danger of heat exhaustion and heat stroke.
