An older Yorkshire terrier reached Rio Grande Veterinary Clinic with a body temperature of 104.6 degrees after becoming overheated in only 30 minutes. She had already been cooled with water, and veterinarian Dr. Victor Lopez believed her temperature had been higher before she arrived.
The case offers a timely warning for dog owners in Webb County, where triple-digit heat was continuing. National Weather Service forecasts repeatedly placed the county under Heat Advisories that week, with temperatures expected to reach 105 degrees and heat index values as high as 109.
“But this only took 30 minutes before this dog got overheated. And she is an older pet, so it makes things a lot more dangerous,” Lopez said. The terrier’s condition after treatment was not provided.
A reading of 104.6 degrees is clearly abnormal, but temperature alone does not establish the full severity of heat illness. The UC Davis School of Veterinary Medicine places a dog’s normal temperature between 99.5 and 102.5 degrees and characterizes heat stroke by a temperature above 105.8 degrees together with neurological and organ problems.
Cornell University uses a similar threshold, describing canine heatstroke as a failure to regulate body temperature as it rises to 105 degrees or higher. Because the terrier had been cooled before her 104.6-degree reading, that measurement cannot show how high her temperature became or how long it remained elevated.
Signs that require immediate action
Dogs rely primarily on panting to release heat, according to Cornell, because they have sweat glands only on their paws. Hot or humid surroundings and strenuous activity can overwhelm that limited cooling system.
Heat illness can progress from weakness, fatigue, tremors, vomiting or diarrhea to confusion, seizures and organ problems, according to UC Davis. Rio Grande Veterinary Clinic specifically identified excessive panting, collapse, vomiting and apparent disorientation as reasons to obtain immediate veterinary care.
Other warning signs listed by the American Veterinary Medical Association include restlessness, excessive drooling, unsteadiness and abnormal gum or tongue color. Owners should not wait for every sign to appear before calling a veterinarian.
Any dog can overheat, but risk is not equal. Senior and overweight dogs, flat-faced dogs, animals with thick coats, and those with airway, heart or lung conditions may have more difficulty regulating heat, according to Cornell and UC Davis. Lopez said the Yorkshire terrier’s older age increased the danger in her case.
Cool the dog while arranging veterinary care
If overheating is suspected, move the dog out of the heat and contact a veterinarian immediately. For an older dog or one with underlying medical problems, the Royal Veterinary College advises pouring water cooler than the dog over the body and combining it with moving air from a fan, breeze or air conditioning.
UC Davis recommends room-temperature water and a fan. It advises against ice water, which can constrict blood vessels and inhibit cooling, and against covering the dog with wet blankets because they can trap heat. Water may be offered in small amounts if the dog is alert, but it should not be forced.
Cooling is first aid, not a substitute for an examination. The Royal Veterinary College advises seeking veterinary guidance as soon as possible even if the animal appears to improve, because serious effects may not be immediately apparent.
Prevention begins by removing predictable hazards. Rio Grande Veterinary Clinic advised against leaving pets in parked vehicles for even a few minutes, exercising them during the hottest part of the day, or carrying them in an unshaded truck bed, including for a short trip.
The clinic also warned owners not to assume an overheated pet will recover without help. The AVMA recommends outdoor access to fresh water and shade, activity during cooler hours, frequent breaks and avoidance of hot asphalt that can burn paw pads.
The terrier’s rapid overheating shows why owners need a plan before symptoms develop: know where to move the dog, how to begin safe cooling and which veterinary facility to call. In a vulnerable dog, waiting for recovery without assistance can allow a heat-related emergency to worsen.
What would you do if your dog were in this situation? Share your thoughts in the comments.
By Sarah Mitchell — 8 years as a local-news reporter covering animal welfare, shelters, neighborhood disputes, and public-safety pet stories.
