# How to Tell If Your Dog Has Heat Stroke and What to Do Immediately


## Key Takeaways

- Heat stroke in dogs is a life-threatening emergency characterized by a failure of thermoregulation, leading to dangerously elevated body temperatures (above 104°F/40°C) and potential organ damage. Clinical signs range from heavy panting and drooling to collapse, seizures, and unresponsive behavior, necessitating immediate veterinary intervention.
- Prompt cooling with cool, not ice-cold, water applied to the body, especially the head, neck, armpits, and groin, is critical first aid while en route to veterinary care. Avoid covering the dog with wet towels, as this can trap heat; instead, keep water flowing or replace towels frequently.
- Do not administer human medications such as aspirin or ibuprofen, as these can exacerbate organ damage and cause gastrointestinal or renal complications in dogs suffering from heat stroke. Veterinary treatment focuses on aggressive cooling, fluid therapy, oxygen support, and monitoring for systemic complications like kidney failure and coagulopathies.
- Differentiating between heat exhaustion and heat stroke is crucial for appropriate action; heat exhaustion may be managed with immediate cooling and rest, while heat stroke requires emergency veterinary care due to ongoing organ damage. Signs like pale, gray, or brick-red gums, labored breathing, or collapse indicate a critical emergency.
- Even if a dog appears to recover after initial cooling, internal damage can persist, making a veterinary examination mandatory. This assessment is vital for identifying and managing potential sequelae such as acute kidney injury, liver damage, or neurological deficits.
- Prevention is paramount and includes never leaving dogs in parked cars, exercising them during cooler parts of the day, ensuring constant access to fresh water and shade, and exercising extreme caution with brachycephalic breeds, who are at higher risk due to their compromised respiratory anatomy.

---

Heat stroke in dogs is a life-threatening emergency. If your dog is collapsing, having seizures, vomiting, or is unable to stand, do not wait. Stop what you are doing and get to the nearest emergency veterinary hospital right now. Call them on the way so they can prepare for your arrival. Every minute counts.

If your dog is showing early signs like heavy panting, drooling, or weakness but is still walking, you can begin cooling them while you drive to the vet. Do not wait to see if they improve on their own. Heat stroke can progress from mild to fatal in a very short time.

The most important thing to know is this: heat stroke is not a wait-and-see condition. Even if your dog seems to recover after cooling down, internal damage can continue. A veterinarian must examine any dog suspected of having heat stroke.

## Is This an Emergency?

Use this table to decide how urgent your dog's situation is. When in doubt, choose the more urgent option.


<!-- figure:auto -->
```figure
{
 "type": "triage",
 "title": "Urgency triage by severity of signs",
 "tiers": [
  {
   "tier": "danger",
   "label": "Go to emergency vet now",
   "signs": [
    "Collapse or inability to stand, seizures, vomiting or diarrhea with blood, bright red or very pale gums, blue or purple tongue, labored breathing that does not slow down, unresponsive to your voice or touch, body temperature above 104°F (40°C) if you can measure it"
   ],
   "action": [
    "Begin cooling immediately and transport to the nearest emergency hospital",
    "Do not stop to wait for an appointment"
   ]
  },
  {
   "tier": "warn",
   "label": "Book same-day appointment",
   "signs": [
    "Heavy, continuous panting that lasts more than 30 minutes after moving to shade, excessive drooling with thick saliva, weakness or stumbling, confusion or seeming dazed, refusing to drink water, dark red gums, rapid heart rate"
   ],
   "action": [
    "Start cooling at home, then call your regular vet or an emergency clinic",
    "Do not wait until tomorrow"
   ]
  },
  {
   "tier": "safe",
   "label": "Watch at home for 1 to 2 hours",
   "signs": [
    "Mild panting that returns to normal within 10 to 15 minutes of rest in a cool place, normal gum color, normal energy level, drinking water normally"
   ],
   "action": [
    "Move your dog to a cool area, offer small amounts of water, and monitor closely",
    "If any sign worsens or does not resolve, seek veterinary care"
   ]
  }
 ]
}
```

| Urgency Level | Signs to Look For | What to Do |
|---|---|---|
| **Go to emergency vet now** | Collapse or inability to stand, seizures, vomiting or diarrhea with blood, bright red or very pale gums, blue or purple tongue, labored breathing that does not slow down, unresponsive to your voice or touch, body temperature above 104°F (40°C) if you can measure it | Begin cooling immediately and transport to the nearest emergency hospital. Do not stop to wait for an appointment. |
| **Book same-day appointment** | Heavy, continuous panting that lasts more than 30 minutes after moving to shade, excessive drooling with thick saliva, weakness or stumbling, confusion or seeming dazed, refusing to drink water, dark red gums, rapid heart rate | Start cooling at home, then call your regular vet or an emergency clinic. Do not wait until tomorrow. |
| **Watch at home for 1 to 2 hours** | Mild panting that returns to normal within 10 to 15 minutes of rest in a cool place, normal gum color, normal energy level, drinking water normally | Move your dog to a cool area, offer small amounts of water, and monitor closely. If any sign worsens or does not resolve, seek veterinary care. |

## What Is Heat Stroke?

Heat stroke happens when your dog's body temperature rises to dangerous levels and their cooling systems stop working. Dogs do not sweat like humans do. They cool themselves mainly by panting, which evaporates moisture from their tongue and airways. When the air is hot and humid, or when a dog is exercising hard, panting cannot keep up with the heat their body produces.

Normal body temperature for a dog is between 101°F and 102.5°F (38.3°C to 39.2°C). When the temperature climbs above 104°F (40°C), the body's cells begin to suffer damage. At 106°F (41.1°C) or higher, organs can start to fail. This is why speed matters.

Heat stroke is different from heat exhaustion. Heat exhaustion is an earlier, milder stage where your dog is overheated but their body can still recover with rest and cooling. Heat stroke means the body's cooling system has failed and organ damage is occurring. You cannot always tell which stage your dog is in just by looking at them.

## Early Signs You Should Not Ignore

The earliest signs of overheating are easy to miss because they look like normal tiredness after exercise. Pay attention to how your dog's panting sounds and how long it lasts.

- Panting that is faster, louder, or more labored than normal
- Panting that continues for more than 10 to 15 minutes after rest in a cool place
- Thick, ropey drool hanging from the mouth
- Bright red gums and tongue
- Restlessness or pacing without settling down
- Seeking out cool surfaces like tile floors or digging at the ground

These signs mean your dog is struggling to cool down. Move them to shade or air conditioning immediately and offer cool water. If the signs do not improve within 10 minutes, call your veterinarian.

## What Else Could Be Going On

Not every dog that pants heavily has heat stroke. Some conditions produce similar signs, and only a veterinarian can tell the difference.

- **Pain from an injury** can cause rapid breathing and restlessness.
- **Anxiety or fear** from thunderstorms, fireworks, or car rides can trigger heavy panting.
- **Heart disease** can cause weakness, rapid breathing, and pale gums.
- **Poisoning** from substances like chocolate or certain plants can cause vomiting, seizures, and collapse.
- **Low blood sugar** can cause weakness, confusion, and tremors.

If your dog has not been exposed to heat or vigorous exercise, heat stroke is less likely. But you cannot rule out these other causes without an examination. The [American Veterinary Medical Association](https://www.avma.org/resources-tools/pet-owners) advises pet owners to contact their veterinarian whenever a dog shows signs of distress that do not resolve quickly.

## What to Do Right Now

If you suspect heat stroke, act immediately.

1. **Move your dog to a cool place.** Shade, air conditioning, or a fan all help.
2. **Start cooling with water.** Use cool, not ice-cold, water. Pour it over your dog's body, especially the head, neck, armpits, and groin. You can use a hose, wet towels, or a bucket. Do not use ice water, which can cause blood vessels to constrict and trap heat inside.
3. **Let your dog drink small amounts of cool water.** Do not force them to drink. Do not let them gulp large amounts at once.
4. **Do not cover your dog with wet towels.** Wet towels can trap heat against the body. If you use towels, replace them frequently with fresh cool ones.
5. **Take your dog to the vet immediately.** Cooling at home is first aid, not treatment. The [MSD Veterinary Manual](https://www.msdvetmanual.com/pet-owners) emphasizes that dogs with heat stroke need professional care to manage organ damage and complications.

Do not give your dog any human medications. Drugs like aspirin or ibuprofen can make heat stroke worse and cause additional organ damage. Any medication must be prescribed by a veterinarian who has examined your dog and determined the correct dose.

## What Happens at the Hospital

At the emergency clinic, the veterinarian will measure your dog's temperature, check their heart and breathing, and run blood tests to assess organ function. Treatment may include intravenous fluids, oxygen therapy, and close monitoring for complications like kidney failure or brain swelling. Some dogs need to stay in the hospital for a day or more.

The cost of emergency treatment varies widely by region and clinic. It can range from a few hundred dollars for mild cases to several thousand for intensive care. Do not let cost concerns delay your decision. Many clinics offer payment plans or can discuss options once your dog is stable. Your dog's life is the priority.

## What You Can Do at Home Right Now

If you suspect heat stroke, start cooling immediately while you prepare to travel to the nearest emergency veterinary hospital. Do not wait to see if your dog improves on their own. Heat stroke can damage the brain, kidneys, liver, and blood clotting system within minutes.

Move your dog to a cool, shaded area or into an air-conditioned room. If you are outside, find shade or carry your dog indoors. Do not let them walk more than necessary. Carrying a large dog is hard, but every step generates more body heat.

Begin active cooling with cool water, not ice water. Use a hose, a sink, or bottles of water. Pour water over your dog's body, especially the head, neck, belly, armpits, and inner thighs. If you have a fan, point it at your dog while they are wet. The combination of water and moving air pulls heat out of the body quickly.

You can place cool, wet towels over your dog's body, but replace them often. A towel left on a hot dog traps heat and turns into a blanket. Change the towels every two to three minutes, or keep pouring water directly over your dog instead.

Offer small amounts of cool water to drink. Do not force your dog to drink. Do not pour water into their mouth. If your dog is too weak to lap water, they need veterinary care immediately.

Stop active cooling once your dog's breathing starts to slow and they seem more alert. The goal is to bring their temperature down, not to make them cold. If you cool too aggressively, you can cause shivering, which actually raises body temperature again.

## What Not to Do

Do not use ice water or ice packs. Ice causes blood vessels near the skin to constrict, which traps heat deep in the body. It also makes your dog shiver, which generates more heat. Cool tap water is the right choice.

Do not give any human medications. Aspirin, ibuprofen, and acetaminophen are toxic to dogs and can cause stomach ulcers, kidney failure, or liver damage. Never give a medication meant for people without a veterinarian's instruction.

Do not force your dog to drink large amounts of water. Drinking too much too fast can cause vomiting, and a vomiting dog with heat stroke is at risk of inhaling fluid into the lungs.

Do not leave your dog alone. Heat stroke can cause seizures, collapse, or cardiac arrest. Someone should stay with your dog at all times and be ready to drive to the hospital.

Do not try to treat this at home and wait to see what happens. Heat stroke is a true emergency. Home cooling is first aid, not treatment. Your dog needs a veterinarian to check for internal damage, give intravenous fluids, and monitor their organs.

## What to Measure and Write Down

Before you call or arrive at the hospital, gather a few pieces of information. This helps the veterinary team act faster.

Count your dog's breathing rate. Watch their chest move and count breaths for 15 seconds, then multiply by four. A normal resting rate is 15 to 30 breaths per minute. Rapid, heavy, or labored breathing is a red flag.

Check your dog's gum color. Lift their lip and look at the gums above the teeth. Healthy gums are pink and moist. Pale, white, gray, or brick-red gums are signs of poor circulation or shock. Press gently on the gum with your finger, release, and count how many seconds it takes for the color to return. Normal refill time is under two seconds.

Note when the signs started and how long your dog was exposed to heat. Write down whether your dog has any medical conditions, such as heart disease, kidney disease, or a history of seizures. List any medications your dog takes regularly.

If you have a thermometer designed for pets, you can take your dog's rectal temperature. Normal is about 101 to 102.5 degrees Fahrenheit. A temperature above 104 degrees is dangerous, and above 106 degrees is critical. If you do not have a thermometer, do not guess. The other signs matter more.

## Heat Exhaustion vs. Heat Stroke

These two terms describe different stages of the same problem. Heat exhaustion is earlier and less severe. Heat stroke is a medical emergency with organ damage.

| Sign | Heat Exhaustion | Heat Stroke |
|------|-----------------|-------------|
| Panting | Heavy but still controlled | Frantic, open-mouthed, or struggling to breathe |
| Gum color | Pink or slightly dark | Pale, gray, brick-red, or blue |
| Drooling | Some thick saliva | Excessive, ropey saliva |
| Weakness | Tired but still walking | Collapse, unable to stand |
| Vomiting or diarrhea | Rare | Common, sometimes with blood |
| Mental state | Dull but responsive | Confused, staring, unresponsive, or seizures |
| Body temperature | 103 to 104 degrees F | Above 105 degrees F |
| What to do | Cool down and call your vet | Emergency hospital immediately |

If your dog shows any sign in the heat stroke column, do not wait. Go to the nearest emergency veterinary hospital now.

## Red Flags That Require Immediate Veterinary Care

Some signs mean your dog's life is in danger. If you see any of these, stop home care and drive to the hospital immediately.

- Collapse or inability to stand
- Seizures or muscle tremors
- Unconsciousness or unresponsiveness
- Vomiting blood or having bloody diarrhea
- Gums that are pale, gray, blue, or brick-red
- Breathing that is labored, noisy, or stops
- A temperature above 105 degrees F
- No improvement after 10 minutes of cooling
- Signs that get worse during cooling

Call the hospital on your way so they can prepare. Tell them you are coming with a suspected heat stroke and give them your dog's temperature and breathing rate if you have them.

## What the Veterinary Visit Looks Like

At the hospital, the team will triage your dog immediately. They will check temperature, heart rate, breathing, gum color, and mental status. They will start intravenous fluids to correct dehydration and support blood pressure.

The veterinarian will likely run blood tests to check kidney and liver function, blood sugar, and electrolyte balance. They may check blood clotting because heat stroke can disrupt the body's ability to clot. Some dogs need oxygen therapy, and some need medications to control seizures or protect the stomach lining.

Your dog will likely stay in the hospital for at least 24 to 48 hours. The veterinarian will monitor temperature, urine output, and organ function over time. Some dogs recover fully, while others develop lasting kidney or brain damage. The outcome depends on how high the temperature got and how quickly treatment began.

The cost of emergency treatment varies widely by region and clinic. A basic emergency visit with fluids and blood work might range from several hundred to over a thousand dollars. Cases requiring intensive care, oxygen, or multiple days of hospitalization can cost several thousand dollars. These are general ranges only, not quotes. Ask the hospital for an estimate before they proceed with non-emergency tests, but do not delay lifesaving treatment while you ask.

The American Veterinary Medical Association and the American Animal Hospital Association both emphasize that heat stroke is preventable and that rapid treatment saves lives. Your veterinarian is your partner in this emergency. Call them, follow their instructions, and get your dog to the hospital as fast as you safely can.

## Common Mistakes Owners Make

Many well-meaning owners accidentally make things worse. Knowing these mistakes can help you act correctly under pressure.

**Mistake: Cooling the dog too quickly with ice water.** Ice water causes blood vessels near the skin to narrow, which traps heat deep inside the body. It can also make the dog shiver, which generates more heat. Use cool tap water, not ice water, and keep the water moving by pouring it or using a fan.

**Mistake: Forcing the dog to drink large amounts of water.** A dog with heat stroke may gulp water and then vomit, which worsens dehydration. Offer small sips every few minutes instead. If the dog cannot swallow or seems dazed, do not give anything by mouth.

**Mistake: Waiting to see if the dog improves before calling a veterinarian.** Heat stroke can damage organs even when the dog appears to recover. The first hour is critical. Call your veterinarian or an emergency clinic as soon as you recognize the signs, even if you are already cooling the dog.

**Mistake: Assuming a collapsed dog is just tired.** Collapse, weakness, or inability to stand after heat exposure is an emergency. Do not let the dog "rest it off." Carry the dog if you can, keep cooling, and go to a clinic immediately.

| Common Mistake | Better Action |
| --- | --- |
| Using ice water or ice packs | Use cool tap water and keep it moving |
| Letting the dog drink freely | Offer small sips every few minutes |
| Waiting to call the vet | Call while you cool the dog |
| Assuming collapse is fatigue | Treat collapse as an emergency and go in |

## How to Reduce the Chance of It Happening Again

Prevention is straightforward once you know your dog's limits.

Never leave a dog in a parked car, even with windows cracked. On a warm day, the temperature inside a car can rise dangerously within minutes. The [American Veterinary Medical Association](https://www.avma.org/resources-tools/pet-owners) warns that this situation is deadly and entirely avoidable.

Exercise dogs during cooler parts of the day, such as early morning or late evening. On hot days, shorten walks and choose shaded routes. Pavement can burn paw pads and radiate heat upward. Place the back of your hand on the pavement for five seconds. If it is too hot for your hand, it is too hot for your dog's feet.

Provide constant access to fresh water and shade. For brachycephalic breeds, those with flat faces like bulldogs and pugs, be extra cautious. Their anatomy makes it harder to cool themselves, and they overheat faster than other dogs.

Never tie a dog outside in the sun. If the dog must be outdoors, ensure a shaded area that moves with the sun and an unspillable water source. Consider a child's wading pool with cool water for supervised play.

## What Recovery and Ongoing Management Usually Look Like

Recovery depends on how severe the heat stroke was and how quickly treatment began.

Dogs with mild heat stroke who receive prompt cooling and veterinary care often improve within 24 to 48 hours. They may be tired and have a reduced appetite for a day or two. Offer bland food in small amounts and encourage rest in a cool, quiet space.

Dogs with severe heat stroke may need hospitalization for several days. Intravenous fluids, oxygen support, and blood tests help veterinarians monitor organ function. The [MSD Veterinary Manual](https://www.msdvetmanual.com/pet-owners) explains that heat stroke can affect the brain, kidneys, liver, and blood clotting system. Some dogs require longer stays and follow-up visits to confirm their organs are healing.

During the first week at home, keep activity very low. No running, no long walks, no play sessions. Watch for delayed signs such as vomiting, diarrhea, dark urine, or unusual tiredness. Report any of these to your veterinarian right away.

Some dogs become more sensitive to heat after an episode. For the next several weeks, limit outdoor time on warm days and monitor your dog closely during any exercise. Your veterinarian may recommend a follow-up blood test to check kidney and liver values, especially for older dogs or those with pre-existing conditions.

## Frequently Asked Questions

**How long does it take for a dog to recover from heat stroke?**
Mild cases often show improvement within 24 to 48 hours with veterinary care. Severe cases may require several days of hospitalization and weeks of restricted activity at home. Full recovery depends on how high the body temperature reached and how quickly cooling began. Your veterinarian will guide you based on blood work and your dog's response to treatment. Some dogs have lasting organ damage, so follow-up exams matter even after the dog seems normal.

**Can I give my dog aspirin or other pain medication for heat stroke?**
No. Never give human medications to a dog without a veterinarian's instruction. Aspirin and similar drugs can cause stomach ulcers, kidney damage, or dangerous bleeding, especially in a dog whose organs are already stressed by heat. If your dog seems painful or uncomfortable, the veterinarian will choose an appropriate medication and determine the correct dose based on your dog's weight and health status.

**Is it safe to put my dog in a cold bath at home?**
Cool water is safe, but cold or icy water is not. Fill a tub with cool tap water and keep the dog in it for no more than a few minutes while you continue cooling. Stop when the dog's breathing slows and it seems more alert. Do not leave the dog unattended in water. The goal is gradual cooling, not a sudden temperature drop, which can cause shock.

**My dog is panting after a short walk. Is that heat stroke?**
Panting is normal cooling behavior, but watch the context. If the walk was short, the day is mild, and the dog stops panting within a few minutes of resting in shade, it is likely normal. If panting continues for more than 10 minutes, becomes loud or labored, or is paired with drooling, weakness, or red gums, treat it as a warning sign and contact your veterinarian.

**Can a dog get heat stroke indoors?**
Yes. Indoor heat stroke happens when air conditioning fails, when a dog is confined to a room with poor airflow, or when a dog is left in a crate in a warm house. Brachycephalic breeds and elderly dogs are at higher risk. Ensure your home has working cooling, fresh water, and a well-ventilated space for your dog on hot days.

**Will my dog be more sensitive to heat forever?**
Not necessarily, but some dogs do develop lasting heat intolerance after a serious episode. Organ damage can reduce the body's ability to regulate temperature. For the first few months, keep your dog out of midday heat and watch closely during exercise. Ask your veterinarian whether follow-up blood tests are recommended to confirm organ recovery.

## Related Clinical & Scientific Guides

* [Dog Ate a Sock and Is Vomiting: What to Do Now](/knowledge/veterinary-medicine/emergency-and-first-aid/dog-ate-sock-vomiting)
* [Dog Ate a Light Bulb: What to Do and When to Worry](/knowledge/veterinary-medicine/emergency-and-first-aid/dog-ate-light-bulb)
* [Dog Ate a Sock and Is Not Eating: What to Do](/knowledge/veterinary-medicine/emergency-and-first-aid/dog-ate-sock-not-eating)


## References and Further Reading

- [AVMA Pet Owner Resources](https://www.avma.org/resources-tools/pet-owners)
- [MSD Veterinary Manual Pet Owner Version](https://www.msdvetmanual.com/pet-owners)
- [AAHA Pet Owner Resources](https://www.aaha.org/for-pet-parents/)

## Related Articles

- [Dog Heat Stroke: How to Tell If It's an Emergency and Cool Your Dog Safely](/knowledge/veterinary-medicine/emergency-and-first-aid/dog-heat-stroke-emergency-cooling)
- [Dog Heat Stroke Temperature Chart: When to Worry and What to Do](/knowledge/veterinary-medicine/emergency-and-first-aid/dog-heat-stroke-temperature-chart)
- [Dog Ate a Sponge: Signs of Blockage and What to Do](/knowledge/veterinary-medicine/emergency-and-first-aid/dog-ate-sponge-blockage)
- [Dog Ate a Sharp Object: Signs of Internal Injury and What to Do](/knowledge/veterinary-medicine/emergency-and-first-aid/dog-ate-sharp-object-signs-internal-injury)
- [Dog Heat Stroke vs. Heat Exhaustion: Know the Difference and Save Your Dog](/knowledge/veterinary-medicine/emergency-and-first-aid/dog-heat-stroke-vs-heat-exhaustion)

> This article is general educational information for pet owners. It is not a substitute for veterinary diagnosis, examination, or treatment. If your pet is showing severe or rapidly worsening signs, contact an emergency veterinary hospital immediately.