Heat Stroke in Dogs: Complete Guide in 2026

Introduction

As a pet parent, all I want is to keep my dog safe, happy, and healthy. But sometimes, despite my best efforts, the heat can sneak up on us. It’s tough to think about, but heatstroke is a real risk that can affect my dog, especially during the hot summer months.

The worst part is that heatstroke is preventable. I realize it’s up to me to protect my dog from the dangers of extreme heat, and knowing how to spot the signs and take action is key. I know that with the right knowledge, I can keep my dog safe from this threat.

In this guide, I’ll walk you through everything I’ve learned about heatstroke—what it is, how to recognize the symptoms, and what to do if it happens. Our dogs depend on us to look out for them, and it’s my job to make sure I’m doing everything I can.

What Is Heatstroke In Dogs?

Heatstroke in dogs occurs when a dog’s body temperature rises to an unsafe level, typically above 104°F (40°C), which can lead to serious complications. Unlike humans, dogs do not have sweat glands all over their bodies, making them more vulnerable to heat-related illnesses. When exposed to extreme heat, a dog's body struggles to regulate its temperature, and heatstroke can quickly set in.

It is a life-threatening emergency that requires immediate attention, as it can cause organ failure, brain damage, or even death if not treated properly. It’s especially concerning in hot weather, during exercise, or when a dog is exposed to the sun for prolonged periods without access to shade or water. In this guide, we’ll take a deeper look into the stages, signs, causes, and treatment of heatstroke in dogs to ensure you’re fully equipped to protect your furry companion.

Stages Of Heatstroke In Dogs

Heatstroke in dogs progresses in stages, each one more severe than the last. It’s crucial to understand these stages so that you can act quickly if your dog shows signs of overheating.

1. Mild Heat Exhaustion: 

This is the first stage where a dog may begin to show mild signs of heat stress, such as excessive panting and increased drooling. The dog may still be able to walk and respond normally but may seem tired or sluggish. If caught early, this stage can often be reversed by moving the dog to a cooler area and providing fresh water.

2. Moderate Heatstroke:

In this stage, the dog’s body temperature rises further (above 104°F), and symptoms become more pronounced. You may notice a decrease in the dog’s coordination, and they may begin to stumble or have difficulty standing. Panting becomes much more intense, and the dog may exhibit vomiting or nausea. Immediate intervention is needed at this stage.

3. Severe Heatstroke:

Severe heatstroke is life-threatening. The dog’s body temperature exceeds 106°F, and the risk of organ failure, brain damage, or death is high. Symptoms include seizures, confusion, and the inability to walk. In this stage, the dog may collapse or become unresponsive. Immediate veterinary attention is critical, as the survival rate drops significantly without fast treatment.

Signs And Symptoms Of Heatstroke In Dogs

Recognizing the signs of heatstroke early can make all the difference in saving your dog’s life. Here are the common signs and symptoms to watch for:

• Excessive Drooling- When dogs get too hot, they often start drooling excessively. This is their body’s way of trying to cool down, but it can indicate that their internal temperature is rising to dangerous levels. Keep an eye on your dog’s mouth – if you notice an unusual amount of drool, it may be time to cool them down.

• Quick Panting- Panting is normal for dogs, but rapid and shallow panting can be a sign of distress. If your dog is panting excessively, especially in hot weather or after exercise, this could be a warning sign that they are struggling to regulate their body temperature.

• Vomiting Or Retching- As the body becomes overwhelmed by heat, it may trigger nausea, causing your dog to vomit or retch. This symptom often occurs alongside excessive panting and drooling and is an indication that heatstroke is becoming more severe.

• Hot To The Touch (Especially On The Top Of The Head)- One of the most telling signs of heatstroke is a dog’s body temperature. Their skin may feel unusually warm, especially around the head and neck. If your dog feels hot to the touch, it’s important to act quickly to cool them down.

• Loss Of Coordination- As heatstroke progresses, your dog may lose their ability to walk properly. They may stagger, fall, or have trouble standing, which can be a sign that their nervous system is being affected by the extreme heat.

• Seizures- In severe cases of heatstroke, seizures can occur due to overheating of the brain. This is an urgent situation that requires immediate medical intervention.

• Inability To Stand Or Walk- If your dog becomes completely unresponsive or unable to stand, this is a critical sign of heatstroke. At this point, immediate action is needed to lower their body temperature and get them to a vet.

For more information on recognizing the signs of overheating and how to handle the situation, check out our article on Signs that your dog is overheating and what to do.

How Do Dogs Get Heatstroke?

Heatstroke in dogs occurs when they are exposed to high temperatures and their bodies are unable to cool down properly. Unlike humans, who can sweat all over their bodies to regulate temperature, dogs only sweat from their paw pads, which is not enough to cool them down effectively in extreme heat. As a result, they are more prone to overheating in hot weather.

Here are the common ways dogs can get heatstroke:

• Hot Weather- High temperatures, especially during summer, increase the risk of heatstroke. Dogs can suffer from heatstroke even on days that seem warm but not excessively hot. When it's 85°F or higher, dogs are at risk, particularly if they’re active or outside without access to shade or water.

• Exercise In Warm Conditions- Physical activity, especially in the heat, puts a significant strain on a dog’s body. Running, playing, or walking in hot weather increases their body temperature quickly. Puppies, senior dogs, and overweight dogs are especially vulnerable during exercise.

• Being Left in a Hot Car- One of the most dangerous situations is when a dog is left inside a parked car, even for just a few minutes. The temperature inside a car can rise rapidly, and dogs can suffer from heatstroke within minutes, even with the windows cracked.

• Inadequate Shade or Water- Dogs that are left outside without proper shelter or access to fresh, cool water are at a much higher risk of overheating. Dogs need to stay hydrated and cool to prevent their body temperature from rising dangerously.

Why Are Dogs More Prone to Heatstroke?

Dogs are more susceptible to heatstroke than humans due to several biological and environmental factors:

• Limited Sweat Glands- Unlike humans, who have sweat glands all over their bodies to help cool down, dogs only sweat through their paw pads. This minimal sweating capability means they have a limited ability to regulate their body temperature in hot conditions.

• Panting Is Their Primary Cooling Mechanism- Dogs primarily rely on panting to cool themselves down. While effective to a degree, panting isn't as efficient as sweating for heat regulation, particularly during extreme heat or prolonged exposure to warmth. If panting becomes overwhelmed, heatstroke can occur.

• Thick Coats- Dogs with thick, double-layered coats are particularly vulnerable to heatstroke. Their fur traps heat and makes it more difficult for them to cool off. While regular grooming helps, certain breeds, especially those with long or double coats, face a higher risk of overheating.

• Obesity- Overweight dogs have a higher risk of heatstroke because they have more body mass that generates heat. Fat tissue also insulates the body, making it harder for dogs to dissipate heat. Obesity can prevent a dog from cooling off efficiently, leading to heat-related illnesses.

• Breed Differences- Some dog breeds are naturally more susceptible to heatstroke. Brachycephalic breeds like Bulldogs, Pugs, and Shih Tzus, which have flat faces, often have difficulty panting effectively. This can impede their ability to regulate their body temperature, increasing their risk for heatstroke.

• Age and Health Conditions- Puppies and older dogs are more vulnerable to heatstroke, as their bodies are less efficient at coping with extreme temperatures. Additionally, dogs with heart disease, respiratory issues, or other health conditions may not regulate their body temperature as effectively.

Diagnosing Heatstroke In Dogs

Diagnosing heatstroke in dogs requires careful observation of their symptoms and a quick assessment of their body temperature. Here’s what you need to know:

• Take the Dog's Temperature- The most accurate way to diagnose heatstroke is by measuring your dog’s body temperature. Use a digital rectal thermometer designed for pets. A temperature of 104°F (40°C) or higher is a clear sign of heatstroke. At this point, immediate action is necessary. For more detailed information on how to measure and understand your dog's body temperature, refer to our [Dog Body Temperature Guide [2026]] for an in-depth explanation.

• Observe the Symptoms- Along with a high temperature, heatstroke symptoms include excessive panting, drooling, vomiting, confusion, loss of coordination, and in severe cases, seizures. If you notice these signs, it’s essential to act quickly.

• Consult Your Veterinarian- Even if you successfully cool your dog down at home, it's a good idea to consult with your veterinarian. They can assess your dog’s condition further, ensure there are no internal organ issues, and provide fluids if needed.

• Blood Tests and Other Diagnostics- If the heatstroke is severe, your vet may perform additional tests such as blood work to check for organ damage, dehydration, and electrolyte imbalances caused by the overheating. This helps in determining the best course of treatment for your dog.

Treatment Of Heatstroke In Dogs

Treating heatstroke in dogs is an emergency situation and requires immediate attention. The goal is to lower your dog’s body temperature and prevent further damage. Here are the steps to take:

• Move Your Dog to a Cooler Area- The first step is to remove your dog from the hot environment and move them to a shaded or air-conditioned area. A cool room or, if possible, a bathroom with a cool, tiled floor is ideal. Keep them calm and avoid over-exertion, as it can worsen the condition.

• Cool Your Dog’s Body- Begin cooling your dog’s body gradually. Use cool (not cold) water to soak a towel or cloth and gently apply it to their body, especially the head, neck, and paws. You can also run cool water over your dog’s body using a hose or in the bathtub. Avoid using ice-cold water, as it can cause blood vessels to constrict, which may hinder the cooling process.

• Offer Fresh Water- Provide your dog with small amounts of fresh, cool water to drink. Avoid forcing them to drink, as they may choke. You can also offer ice chips if your dog is not drinking willingly.

Can Heatstroke In Dogs Be Treated At Home?

While it is possible to manage mild cases of heatstroke at home, severe heatstroke always requires immediate veterinary care. Here’s a breakdown of what can be done at home and when to seek professional help:

1. Mild Cases

If you catch heatstroke early and your dog’s symptoms are mild (excessive panting, drooling, and mild lethargy), you can try cooling them down at home. Provide a cool environment, offer water, and gradually lower their body temperature with cool, wet towels. Keep monitoring their temperature, and if it drops to a safe level (around 103°F or below), and they start to recover, it’s safe to continue to monitor them at home for the rest of the day. However, a vet visit is still recommended to ensure there are no lasting effects.

2. Severe Cases

For severe cases of heatstroke (temperature above 104°F, seizures, loss of consciousness, or inability to stand), home treatment is not enough. In these cases, the risks of organ failure, brain damage, or death are high, and immediate professional intervention is necessary. Even if your dog appears to recover after at-home cooling, always follow up with a vet.

3. Ongoing Monitoring

After your dog’s temperature normalizes, it’s important to keep them hydrated and monitor for any delayed symptoms. Heatstroke can sometimes lead to complications like kidney failure or shock, even after the initial cooling process. If your dog seems to worsen or doesn’t recover as expected, visit the vet immediately.

At-home treatment can help in mild cases, but the safest course of action for severe heatstroke is always professional veterinary care.

How To Prevent Heatstroke In Dogs

Preventing heatstroke in dogs is much easier than treating it. Here are some effective strategies to ensure your dog stays cool and safe, especially during hot weather:

• Ensure They Have Fresh, Cool Water- Always provide your dog with access to fresh, cool water. Dehydration is a major risk factor for heatstroke, so make sure your dog is drinking regularly, especially when they’re outside or exercising. Consider using a portable water bowl when taking your dog on walks or trips to the park.

• Never Leave Your Pets Unattended In A Parked Car- Never leave your dog alone in a parked car, even for a few minutes. The temperature inside a car can rise quickly, even on relatively mild days, leading to a life-threatening situation in minutes. If you must run errands, it’s safer to leave your dog at home in a cool, shaded area.

• Keep Your Dog's Coat Well Maintained- Regular grooming can help regulate your dog’s body temperature. Brush out thick, long fur regularly to prevent matting, which traps heat. For breeds with heavy coats, consider shaving or trimming during the hotter months to help them stay cool, but always consult with your vet on the best grooming practices for your dog's breed.

• Provide Shade When Outdoor Time Is Unavoidable- If your dog must be outside in the heat, ensure there is plenty of shade available. Setting up an umbrella or shade tent can help protect them from the sun. If your dog is very sensitive to heat, limit outdoor activities to early morning or late evening when the temperatures are cooler.

• Limit Physical Activity During the Heat of the Day- During the hottest parts of the day (usually between 10 a.m. and 4 p.m.), avoid vigorous exercise with your dog. Instead, opt for shorter walks during cooler hours of the day, such as early mornings or evenings. On especially hot days, consider skipping walks altogether or providing indoor playtime instead.

• Use Cooling Products- Consider investing in cooling vests, mats, or bandanas that are designed to help regulate your dog’s body temperature. These products use evaporative cooling or ice packs to help keep your dog cool, especially on hot days when outdoor activities are unavoidable.

• Monitor Your Dog’s Environment- One of the most effective ways to prevent heatstroke is by monitoring the environment. The Waggle Pet Monitor helps keep track of a pet’s surroundings, providing real-time temperature monitoring to ensure it remains within a safe range. Some of the features include:

• Temperature Monitoring: Tracks the room temperature to ensure it stays safe for pets.

• Instant Alerts: Sends notifications when the temperature becomes dangerous, allowing for immediate action.

• Live Monitoring: Provides remote access to check on the temperature, even when not at home.

• Two-Way Audio: Allows pet owners to comfort their dogs if they’re feeling stressed or overheated.

Taking these precautions can significantly reduce the risk of heatstroke in dogs, keeping your furry friend safe and comfortable during hot weather.

When To Visit The Vet

Even with prompt at-home treatment, there are situations where a visit to the vet is crucial. If your dog’s body temperature remains above 103°F despite cooling efforts, or if they show signs of organ dysfunction, such as vomiting, diarrhea, or confusion, it’s important to seek professional care. These symptoms may indicate that the heatstroke is more severe and could require medical intervention like IV fluids or medication. Additionally, if your dog experiences severe symptoms such as seizures, collapse, or an inability to stand, it's a medical emergency that demands immediate veterinary attention to prevent permanent organ damage.

Even if your dog seems to recover fully after heatstroke, a vet visit is essential to rule out lingering health issues or internal damage. A veterinarian can assess your dog’s recovery, monitor for any potential complications, and offer advice on preventing future heatstroke episodes based on their health, breed, and age. If you’re unsure whether your dog’s symptoms are due to heatstroke or another condition, it’s always best to consult with a vet for a proper diagnosis to ensure your dog’s well-being.

Conclusion

Heatstroke in dogs is a serious and potentially life-threatening condition that requires immediate attention. By understanding the symptoms, causes, and preventive measures, you can significantly reduce the risk of heatstroke and ensure your dog stays safe in hot weather. Always be proactive in managing your dog’s exposure to heat, whether through hydration, shade, or limiting exercise during the hottest parts of the day. Regular grooming and cooling products can also be essential tools for keeping your dog comfortable in warm conditions.

Remember, if your dog shows signs of heatstroke, prompt action can save their life. While mild cases can sometimes be managed at home, severe heatstroke always requires veterinary intervention. By being aware of the risks and knowing how to respond, you can help protect your furry companion from the dangers of heatstroke, ensuring many more happy and healthy days together.

FAQs

1. What Are The Three Stages Of Heat Exhaustion In Dogs?

The three stages are mild heat exhaustion (excessive panting and drooling), moderate heatstroke (loss of coordination), and severe heatstroke (seizures and organ failure).

2. How Do Dogs Act When They Are Overheated? 

Overheated dogs pant excessively, drool more, become lethargic or uncoordinated, and may experience vomiting or collapse.

3. What Should I Do If My Pet Has Heatstroke?

Move them to a cooler area, cool them down with water, offer water to drink, and contact a vet immediately if their temperature exceeds 104°F.

4. How Long Will It Take A Dog To Recover From Heat Exhaustion? 

Recovery time depends on severity, but mild cases can recover in a few hours, while severe cases may take longer with veterinary treatment.

5. If I Successfully Cool My Dog To 103°F, Do I Still Have To Take Her To The Vet?

Yes, even if their temperature lowers, it's best to visit a vet to ensure there is no internal damage.

6. What Are Some Possible Consequences Of Hyperthermia?

Hyperthermia can lead to organ failure, brain damage, kidney damage, and even death if untreated.

7. Is It Okay to Leave My Dog In A Parked Car?

No, never leave your dog in a parked car, as temperatures inside can rise quickly and cause heatstroke.

8. Is It True That Dogs Don’t Sweat? 

Yes, dogs only sweat through their paws and rely primarily on panting to cool down.