Heatstroke in Dogs and Cats: How to Spot the Signs Before It's Too Late

A guide from Utah Veterinary Emergency Center for pet owners in Herriman, South Jordan, Riverton, and Bluffdale.

Utah summers bring triple-digit temperatures, bone-dry air, and relentless afternoon sun. For pet owners across the southwest Salt Lake Valley, that combination makes heatstroke one of the most dangerous and time-sensitive emergencies we treat at Utah Veterinary Emergency Center (UVEC) in Herriman. Every summer, our urgent care team sees a surge of dogs and cats suffering from heat-related illness, and many of those cases could have been prevented or caught earlier.

Understanding how heatstroke develops, recognizing the warning signs, and knowing what to do in the first critical minutes can mean the difference between a full recovery and a life-threatening outcome.

What Is Heatstroke, and Why Are Pets So Vulnerable?

Heatstroke occurs when a pet's core body temperature rises above 104°F and the body's natural cooling mechanisms are overwhelmed. Dogs and cats don't sweat the way humans do. Dogs rely almost entirely on panting, and cats primarily cool through grooming and paw pad perspiration, neither of which is efficient enough when ambient temperatures soar.

The result is a cascading internal crisis: organ tissues begin to swell, the GI tract loses its protective barrier, clotting factors become disrupted, and the kidneys and liver come under acute stress. If the body temperature reaches 106°F or higher, permanent organ damage and death can occur within minutes.

Herriman, South Jordan, Riverton, and Bluffdale sit at roughly 4,400 to 5,000 feet of elevation. The thinner air and intense UV exposure at altitude accelerate dehydration and overheating, even on days that don't feel dangerously hot.

Pets at the Highest Risk

Any dog or cat can develop heatstroke, but certain animals are especially vulnerable:

• Brachycephalic breeds like Bulldogs, Pugs, French Bulldogs, and Persian cats have compressed airways that make panting far less effective
• Senior pets and very young animals have less resilient thermoregulation
• Overweight pets carry extra insulation that traps heat
• Dogs with thick double coats, such as Huskies and Malamutes, struggle despite their love of winter
• Any pet with a heart condition, respiratory disease, or history of prior heat-related illness is at elevated risk

Warning Signs Every Pet Owner Should Know

Heatstroke progresses fast. Early recognition is everything.

Early signs

• Excessive panting
• Thick or ropy drool
• Bright red gums and tongue
• Restlessness or agitation
• Glassy or unfocused eyes
• Rapid heart rate

Severe signs requiring immediate urgent care

• Vomiting or diarrhea
• Stumbling or inability to stand
• Gums turning pale, gray, or blue
• Collapse or loss of consciousness

If you see any of the severe signs, your pet needs urgent veterinary care immediately. Internal damage is already underway. Do not wait to see if your pet improves on their own.

What to Do If You Suspect Heatstroke

The minutes between recognizing heatstroke and arriving at a veterinary clinic are critical. Here is what you should and should not do:

1. Move your pet out of the heat immediately. Get them into air conditioning, shade, or the coolest environment you can find.
2. Begin active cooling with room-temperature water. Wet their paw pads, ears, groin, and belly. Drape damp towels over them, but replace them frequently since a warm towel acts as insulation. Do not use ice water or ice packs, as extreme cold causes blood vessels to constrict and actually traps heat inside the body.
3. Offer small amounts of cool water to drink. Don't force water. If your pet won't drink on their own, don't push it.
4. Get to a veterinary urgent care clinic as fast as you can. Call Utah Veterinary Emergency Center at (801) 218-2227 before you leave if possible. Even if your pet appears to recover, internal damage such as kidney injury, clotting disorders, or GI compromise can develop hours later. UVEC in Herriman is equipped to run immediate bloodwork, administer IV fluid therapy, and monitor organ function in real time.

The Biggest Mistakes We See

One of the most common errors is assuming a pet is fine because they seem to bounce back after cooling down. Heatstroke triggers a systemic inflammatory response that can continue escalating even after body temperature returns to normal. A pet that looks better at home may be developing acute kidney failure or disseminated intravascular coagulation (DIC) internally. That's why veterinary evaluation after any suspected heatstroke episode is not optional; it's essential.

The other critical mistake is using ice water to cool a pet. We understand the instinct, but ice-cold water causes peripheral vasoconstriction, which prevents heat from dissipating through the skin. Room-temperature water and airflow are far more effective.

Prevention: Keeping Your Pet Safe This Summer

Most heatstroke cases are preventable with a few straightforward habits:

• Limit outdoor exercise to early morning or after sunset
• Never leave your pet in a parked car, even for a few minutes—interior temperatures can exceed 120°F within ten minutes on a 90°F day
• Provide constant access to fresh water and shade during any outdoor time
• Be cautious on asphalt, concrete, and sand, which absorb heat and can burn paw pads. Walk on grass wherever possible
• Pay close attention to brachycephalic breeds, older animals, and overweight pets, who will overheat faster than you expect

Quick test: Place the back of your hand on the pavement and hold it for seven seconds. If it's too hot for your hand, it's too hot for your pet's paws.

What to Expect at UVEC for a Heatstroke Emergency

At Utah Veterinary Emergency Center, our urgent care team treats heatstroke as the multi-system emergency it is. On arrival, we take a rectal temperature, assess cardiovascular status, and begin IV fluid therapy to support organ perfusion. We run comprehensive bloodwork to evaluate kidney and liver function, check clotting times, and assess electrolyte balance. Depending on severity, your pet may need GI protectants, anti-nausea medications, plasma transfusion for clotting support, or monitored observation to watch for delayed complications.

We keep you informed every step of the way because we believe you deserve to understand exactly what's happening with your pet and why we're recommending each step of treatment.

We're Your Neighbor

Utah Veterinary Emergency Center was built specifically to give pet owners in Herriman, South Jordan, Riverton, and Bluffdale a local, independent option for urgent veterinary care without the long drive to specialty hospitals across the valley. We're right here in your community, staffed by veterinarians who practice the gold standard of medicine and treat every patient like their own. When the unexpected happens this summer, we're ready.