Close this search box.
Home SAFETY TIPS & ADVICEDog Summer Care Heatstroke in Dogs: A Silent Killer in Hot Cars

Heatstroke in Dogs: A Silent Killer in Hot Cars

by Bella Woof
Dog Summer

Heatstroke in Dogs: A Silent Killer in Hot Cars


As the summer months approach, it is important to be mindful of the dangers of heatstroke in dogs, particularly when they are left unattended in hot cars. Heatstroke can occur quickly and lead to serious, even fatal, consequences for our furry friends. This article aims to shed light on the seriousness of heatstroke in dogs, specifically focusing on the risks associated with leaving them in hot cars. Furthermore, a FAQ section at the end will address common questions regarding preventative measures and treatment for heatstroke.

Heatstroke in Dogs
Understanding Heatstroke in Dogs:

Heatstroke, also known as hyperthermia, occurs when a dog’s body temperature rises to dangerously high levels. Unlike humans, who can regulate their body temperature through sweating, dogs rely on panting as their primary way to cool down. When exposed to high temperatures, particularly in enclosed spaces like cars, panting may not be enough to dissipate the heat effectively. This can lead to a rapid increase in body temperature, causing damage to internal organs and systems.

Risks of Leaving Dogs in Hot Cars:

Leaving dogs unattended in hot cars is an extremely risky practice that can result in severe consequences. The temperature inside a car can escalate quickly, even on mild days. According to the American Veterinary Medical Association (AVMA), the temperature inside a parked car can rise by approximately 20 degrees Fahrenheit in just 10 minutes. Within 30 minutes, the temperature can increase by 34 degrees or more. These temperature increases can be life-threatening, causing heatstroke or even death.

Heatstroke in Dogs
Factors that contribute to the rapid temperature increase inside a parked car include:

1. Lack of ventilation: Even with partially open windows, the airflow inside a car is generally not sufficient to keep the temperature at a safe level for dogs.

2. Sun exposure: The sun’s rays pass through the windows and can transform the car into a mini greenhouse, trapping heat inside.

3. Humidity: High humidity levels can exacerbate the heat and make it even more dangerous for dogs.

4. Breed and age: Some dog breeds, such as brachycephalic breeds (e.g., Bulldogs, Pugs), are more susceptible to heatstroke due to their anatomical features, which hinder their ability to cool down effectively. Additionally, young puppies and elderly dogs are more vulnerable to heatstroke.

Signs and Symptoms of Heatstroke in Dogs:

It is crucial for dog owners and caregivers to recognize the signs of heatstroke to act swiftly and seek appropriate medical attention. Some common symptoms of heatstroke in dogs include:

1. Excessive panting: While panting is a normal behavior in dogs, excessive panting may indicate heatstroke.

2. Salivating excessively: Dogs suffering from heatstroke will often drool excessively.

3. Rapid breathing: Shallow and rapid breathing is a sign that a dog is struggling to regulate its body temperature.

4. Vomiting and diarrhea: Heatstroke can cause gastrointestinal distress in dogs, leading to vomiting and diarrhea.

5. Weakness and collapsing: As the body temperature rises, dogs may become weak, unable to stand, and may ultimately collapse.

6. Bright red or blue gums: The color change in the gums is a sign of oxygen deprivation, which can occur during heatstroke.

7. Wobbly gait: Dogs suffering from heatstroke may exhibit an unsteady or wobbly gait.

Immediate Actions to Take:

If you encounter a dog trapped inside a hot car, it is important to act quickly. The first step should be to try and locate the owner of the vehicle, as they may be unaware of the dangers they have put their dog in. If the owner cannot be located or does not respond promptly, contacting local authorities or animal welfare organizations, such as the police or animal control, should be the next course of action.

Additionally, it is advisable to document the situation by taking photos or videos of the dog inside the car to support any future legal actions. While individual laws vary across regions, leaving a dog in a hot car can be considered animal cruelty in many jurisdictions.

Frequently Asked Questions (FAQ):Heatstroke in Dogs

1. How long does it take for a car to become dangerously hot?
The temperature inside a car can become dangerously hot within minutes. Under normal conditions, the temperature inside a car can rise by approximately 20 degrees Fahrenheit within the first 10 minutes, and by 34 degrees or more within 30 minutes.

2. Are there any specific precautions one should take during summer outings with dogs?
Absolutely! When taking your dog on outings during the summer, it is crucial to plan accordingly. Plan activities during cooler times of the day, such as early morning or late evening, to avoid peak heat hours. Always provide access to shade and fresh water, and consider carrying a portable water bowl. Additionally, avoid asphalt surfaces, as they can become extremely hot and burn the pads of your dog’s paws.

3. Can cracking the windows in a car prevent heatstroke?
While cracking the windows may improve ventilation slightly, it is not sufficient to prevent heatstroke. The temperature inside a car can still rise quickly, and cracking the windows does not provide enough airflow to cool down the dog effectively.

4. What should be done if a dog shows signs of heatstroke?
If a dog shows signs of heatstroke, it is crucial to take immediate action. Move the dog to a cool and shaded area, and try to bring its body temperature down by applying cool (not cold) water to the dog’s body. Focus on the areas with minimal fur, such as the belly and armpits. Offer small amounts of water for the dog to drink, but do not force it. Finally, seek veterinary assistance as soon as possible.

5. How can heatstroke be prevented?
The best way to prevent heatstroke in dogs is to never leave them unattended in a parked car, regardless of the weather. Even on relatively cooler days, the temperature inside a car can still skyrocket to life-threatening levels. If it is not possible to bring the dog with you inside a store or other establishment, it is better to leave them at home in a safe and comfortable environment.


Heatstroke in dogs is a silent killer, particularly when they are left unattended in hot cars. The dangers associated with this practice should not be underestimated, as the temperature inside a parked car can rise rapidly and lead to grave consequences. Recognizing the signs of heatstroke and taking immediate action is crucial for the well-being and survival of our canine companions. By spreading awareness and following preventative measures, we can work towards keeping our furry friends safe and cool during the hot summer months. Remember, it is better to be safe than sorry – never leave your dog in a hot car!

You may also like