What condition occurs when a dog overheats and cannot cool down properly?

The story behind the answer

Heatstroke is the dangerous state when a dog’s body overheats and can’t cool down, leading to rapidly rising core temperature and potential organ damage. Dogs have few sweat glands and mainly cool by panting and through paw pads; in hot, humid, or confined conditions (like a parked car), panting can’t keep up. Signs include heavy panting, drooling, bright red or pale gums, vomiting, wobbliness, and collapse. Immediate cooling and veterinary care are critical.

Context check: Hyperthermia is the broader term for elevated body temperature; heatstroke is its life-threatening extreme. Fever is a controlled temperature rise from illness, and dehydration is fluid loss—not necessarily extreme overheating. Memory tip: HOT DOG—Heatstroke Often Threatens Dogs On the Go; if you suspect it, think COOL: Cool with te