Signs of Heatstroke in Dogs and How to Prevent It

Heatstroke is a life-threatening emergency that can develop in dogs within minutes on a hot day. Knowing the warning signs — and how to act fast — could save your dog's life. Here's what every dog owner needs to know heading into summer.

What Is Heatstroke in Dogs?

Heatstroke (hyperthermia) occurs when a dog's body temperature rises above 39.4°C (103°F) and the body can no longer cool itself down. Unlike humans, dogs can't sweat effectively — they rely almost entirely on panting, which becomes insufficient in extreme heat or humidity.

Warning Signs of Heatstroke

Act immediately if you notice any of these symptoms:

• Excessive, heavy panting that doesn't slow down
• Drooling or foaming at the mouth
• Bright red, pale, or bluish gums
• Glazed or unfocused eyes
• Weakness, stumbling, or collapse
• Vomiting or diarrhea
• Rapid or irregular heartbeat
• Loss of consciousness

Symptoms can escalate from mild to severe within minutes. Don't wait to see if your dog "gets better" on their own.

What to Do If Your Dog Has Heatstroke

Heatstroke is a veterinary emergency. Here's what to do while you get your dog to the vet:

1. Move them to a cool, shaded area immediately — indoors with air conditioning is ideal.
2. Offer small sips of cool (not ice cold) water. Don't force them to drink.
3. Apply cool (not cold) water to their neck, armpits, and groin area.
4. Fan them to help evaporation cool their body.
5. Call your vet immediately and head to the clinic — even if your dog seems to recover, internal damage may have occurred.

Do not use ice or ice-cold water — this can cause blood vessels to constrict and actually trap heat inside the body.

Which Dogs Are Most at Risk?

All dogs can suffer from heatstroke, but some are especially vulnerable:

• Brachycephalic breeds (Bulldogs, Pugs, French Bulldogs) — their short airways make panting less effective
• Elderly or very young dogs
• Overweight dogs
• Dogs with thick or dark coats
• Dogs with heart or respiratory conditions

How to Prevent Heatstroke

Prevention is always better than treatment. Follow these steps every hot day:

• Walk your dog in the early morning or evening, avoiding peak heat hours (11am–4pm)
• Always carry fresh water and offer it frequently
• Never leave your dog in a parked car, even briefly
• Provide constant access to shade and cool spaces
• Use a cooling collar to help regulate body temperature on walks

The Role of Cooling Gear in Prevention

One of the most effective preventive tools is a quality cooling collar. Our Instant Cooling Pet Collar – Summer Ice Gel Bib targets the neck area — where major blood vessels run close to the surface — to help lower your dog's core temperature during outdoor activity. It's a simple, reusable solution that can make a real difference on hot days.

For more summer safety tips, read our guide on how to keep your dog cool in summer.

Stay Prepared This Summer

Heatstroke is scary, but it's largely preventable with the right habits and gear. Know the signs, act fast if needed, and take proactive steps to keep your dog cool every day. 🐕☀️