Heatstroke in pets is a life-threatening emergency that can develop in minutes.

Unlike people, dogs and cats cannot regulate their body temperature as efficiently. Dogs primarily cool themselves by panting, and cats have limited ways to dissipate heat. When temperatures rise too high, their bodies can quickly become overwhelmed.

Without prompt treatment, heatstroke can lead to organ damage, blood clotting abnormalities, and even death.

At Pieper Veterinary, our Emergency teams treat heat-related emergencies every summer. Recognizing the warning signs and acting quickly can save your pet’s life.

In this guide, you’ll learn:

• Signs of heatstroke in dogs and cats
• What to do if your dog has heatstroke
• Which pets are most at risk
• How to prevent heat-related emergencies
• When to seek emergency veterinary care

Think your pet may be overheating? Contact Pieper Veterinary or head to your nearest emergency location immediately.

What Is Heatstroke in Dogs and Cats?

Heatstroke occurs when a pet’s body temperature rises to a dangerous level and they can no longer cool themselves effectively.

Normal body temperature for dogs and cats generally ranges between 100°F and 102.5°F.

While elevated temperatures above normal can be concerning, heatstroke is generally diagnosed when a pet’s body temperature reaches approximately 105.8°F or higher and is accompanied by signs of neurologic dysfunction.

Without rapid intervention, heatstroke can cause:

• Organ failure
• Gastrointestinal injury
• Kidney damage
• Abnormal blood clotting
• Shock
• Death

Heatstroke is always considered a medical emergency.

What Causes Heatstroke in Pets?

Common causes include:

• Being left in a parked car, even for a few minutes
• Excessive exercise during warm weather
• High humidity
• Limited access to water
• Lack of shade outdoors
• Strenuous activity during the hottest parts of the day

Even temperatures that seem moderate can become dangerous, especially when humidity is high.

What Are the Signs of Heatstroke in Dogs?

Recognizing symptoms early can make all the difference.

Early Dog Heatstroke Symptoms

• Excessive panting
• Increased drooling
• Restlessness
• Weakness or lethargy
• Vomiting
• Mild diarrhea
• Seeking cool surfaces

These signs indicate that your pet is struggling to regulate their body temperature.

Advanced Signs of Heatstroke in Dogs

• Profuse vomiting or diarrhea
• Collapse or inability to stand
• Confusion or disorientation
• Bright red or pale gums
• Tremors
• Seizures
• Unresponsiveness

These signs indicate a medical emergency.

If your pet is collapsing, having seizures, or appears mentally altered, seek emergency veterinary care immediately.

Can Cats Get Heatstroke?

Yes. Although less common than in dogs, heatstroke in cats can occur and can be equally serious.

Signs of heatstroke in cats may include:

• Panting
• Drooling
• Weakness
• Vomiting
• Rapid breathing
• Lethargy
• Collapse

Cats often hide signs of illness, so any evidence of overheating should be taken seriously.

What Should I Do If My Dog Has Heatstroke?

If you suspect heatstroke, begin first aid immediately while arranging emergency veterinary care.

Step 1: Move to a Cool Area

Bring your pet indoors, into shade, or into an air-conditioned environment.

Step 2: Start Cooling Gradually

Use cool—not ice-cold—water.

Focus on:

• Belly
• Paws
• Armpits
• Groin area

Use fans if available to promote cooling.

Step 3: Offer Small Amounts of Water

If your pet is alert and able to swallow normally, offer small amounts of water.

Do not force your pet to drink.

Do not offer water if they appear mentally altered or are unable to swallow safely.

Step 4: Seek Emergency Veterinary Care Immediately

Even if your pet appears to improve, internal injuries may still be occurring.

Heatstroke requires veterinary evaluation and monitoring, even when symptoms seem to resolve.

What Should I NOT Do If My Dog Has Heatstroke?

Avoid the following:

• Do not use ice baths
• Do not cover your pet with ice packs
• Do not apply rubbing alcohol
• Do not force water
• Do not wait to see if symptoms improve

Cooling too rapidly can cause additional complications and delay appropriate treatment.

Which Pets Are Most at Risk for Heatstroke?

Some pets are more vulnerable than others.

Higher-risk pets include:

• Brachycephalic breeds, including Bulldogs and Pugs
• Senior pets
• Overweight pets
• Pets with heart disease
• Pets with respiratory disease
• Thick-coated breeds
• Very young puppies and kittens

These pets may develop heat-related illness more quickly than others.

When Should I Go to the Emergency Vet for Heatstroke?

Seek emergency veterinary care immediately if your pet has:

• Vomiting or diarrhea
• Weakness or collapse
• Confusion or disorientation
• Seizures
• Persistent heavy panting
• Difficulty breathing
• Unresponsiveness

Heatstroke can worsen rapidly. Minutes matter.

At Pieper Veterinary, our Emergency teams are available to evaluate and treat heat-related emergencies and provide advanced supportive care when needed.

How Can I Prevent Heatstroke in Dogs and Cats?

Fortunately, many cases of heatstroke are preventable.

Never Leave Pets in Parked Cars

Vehicle temperatures can become dangerous within minutes.

Walk During Cooler Parts of the Day

Choose early morning or late evening walks whenever possible.

Provide Fresh Water

Ensure your pet always has access to clean drinking water.

Avoid Hot Pavement

Hot surfaces can cause burns and contribute to overheating.

Limit Strenuous Activity

Reduce exercise during hot and humid weather.

Provide Shade Outdoors

Pets should always have access to shaded areas and cool environments.

Simple precautions can dramatically reduce the risk of heat-related emergencies.

Heatstroke Is Preventable

Every summer, veterinary emergency hospitals treat pets suffering from preventable heatstroke.

The good news is that awareness and prompt action can make all the difference.

Recognizing the early signs of overheating, taking immediate action, and seeking veterinary care quickly can save your pet’s life.

Emergency Heatstroke Care in Connecticut

If you’re worried your pet may be overheating, don’t wait.

At Pieper Veterinary, our Emergency teams provide compassionate, advanced care for pets experiencing heat-related emergencies throughout Connecticut.

If your pet is showing signs of heatstroke, contact Pieper Veterinary or visit one of our emergency hospitals immediately. Prompt treatment can be lifesaving.