Is Your Pet Overheating? How to Recognize Heat Stroke and Heat Exhaustion in Dogs and Cats

Summer in Baltimore is a wonderful time to get outside with your pets—but high temperatures and humidity can quickly become dangerous for dogs and cats.

Every year, veterinary hospitals treat pets suffering from heat-related illnesses, many of which develop faster than owners expect. The good news? Knowing the early warning signs and acting quickly can make all the difference.

Here's what every pet owner should know.

What Is Heat Stroke?

Heat stroke occurs when a pet's body temperature rises to dangerous levels and can no longer cool itself effectively.

Unlike people, dogs don't sweat over most of their bodies. They rely primarily on panting to regulate their temperature, while cats groom themselves and seek cooler places. During hot, humid weather, these cooling methods may not be enough.

Without prompt treatment, heat stroke can affect the brain, heart, lungs, kidneys, and other organs. It is a true medical emergency.

Heat Stress vs. Heat Stroke

Think of heat stress as the warning stage.

Your pet may be uncomfortable but is still able to cool down with rest, water, and moving to a cooler environment.

Heat stroke occurs when those natural cooling mechanisms fail, and the body's temperature continues to rise. At this point, immediate veterinary care is essential.

Early Warning Signs

Recognizing heat illness early can help prevent it from becoming life-threatening.

Watch for:

• Excessive panting

• Drooling more than usual

• Bright red gums

• Restlessness

• Seeking shade or refusing to walk

• Weakness

• Vomiting

• Diarrhea

These signs should never be ignored, especially after exercise or time outdoors.

Signs of Heat Stroke

As heat stroke progresses, symptoms become much more serious.

Seek veterinary care immediately if your pet develops:

• Collapse

• Difficulty standing

• Confusion or disorientation

• Pale or dark red gums

• Rapid heartbeat

• Seizures

• Loss of consciousness

Heat stroke is not something to "wait and see" if it improves.

Which Pets Are Most at Risk?

While any pet can overheat, some are more vulnerable than others.

Higher-risk pets include:

• Puppies and kittens

• Senior pets

• Overweight pets

• Dogs with thick coats

• Flat-faced breeds such as Bulldogs, French Bulldogs, Pugs, Boston Terriers, Persian cats, and Himalayan cats

• Pets with heart or respiratory disease

Even healthy pets can develop heat stroke if they're overexerted or left in a hot environment.

What Should You Do If You Think Your Pet Is Overheating?

If you suspect your pet is experiencing heat illness:

✔️ Move them to a shaded or air-conditioned area.

✔️ Offer small amounts of cool (not ice-cold) water.

✔️ Wet their paws, belly, and body with cool water.

✔️ Use a fan if available.

✔️ Contact a veterinarian right away.

What NOT to Do

Many owners mean well but accidentally make the situation worse.

Avoid:

• Ice baths

• Ice packs directly against the body

• Forcing your pet to drink

• Waiting several hours to see if they improve

Cooling a pet too rapidly can actually interfere with the body's ability to regulate temperature.

Preventing Heat Stroke

Fortunately, many heat-related emergencies are preventable.

Here are a few simple ways to protect your pet:

• Walk during the early morning or evening.

• Always bring fresh water.

• Take frequent breaks in the shade.

• Never leave your pet in a parked car.

• Avoid strenuous exercise during hot or humid weather.

• Test sidewalks before walking your dog.

• Watch for signs of fatigue before your pet does.

🐾 From the Exam Room

One of the most common things we hear is, "He was acting completely normal this morning."

Heat illness can develop surprisingly quickly, especially during humid Maryland summers. If your pet suddenly slows down, struggles to catch their breath, or just seems "off" after being outside, it's always worth having them evaluated sooner rather than later.

When Should You Seek Veterinary Care?

If your pet is showing any signs of heat stroke—or if you're unsure whether they're recovering normally—don't delay.

Early treatment often leads to better outcomes and can help prevent complications affecting the kidneys, brain, or other organs.

When in doubt, it's always safer to have your pet examined.

If your dog or cat develops signs of heat exhaustion or heat stroke, prompt veterinary care can make all the difference.

At Swan Harbor Pet Urgent Care, we provide walk-in urgent care Monday through Friday from 9:00 a.m. to 3:00 p.m. We also offer daily wellness visits, and our convenient free parking lot makes it easy to get your pet the care they need without added stress.

We hope your summer is filled with safe adventures, happy memories, and plenty of wagging tails and contented purrs!

Frequently Asked Questions

Can cats get heat stroke?

Yes. Although cats are less likely to overexert themselves outdoors than many dogs, they can absolutely develop heat stroke, especially older cats, overweight cats, and those without access to cool indoor spaces.

Is heavy panting always an emergency?

Not necessarily. Some panting after exercise is expected, but excessive panting that doesn't improve after resting in a cool environment should be evaluated.

How hot is too hot for my dog?

There isn't one temperature that's dangerous for every pet. Humidity, sunlight, breed, age, and activity level all play a role. During hot Baltimore summers, it's safest to exercise pets early in the morning or later in the evening.

Can I use ice water to cool my pet?

No. Cool water is recommended, but ice-cold water or ice baths can cool the body too quickly and may make it harder for your pet to regulate their temperature.