Dogs die in hot cars every year despite decades of public awareness campaigns — temperatures inside parked vehicles reach lethal levels within minutes, causing hyperthermia and organ failure.
A dog dying in a hot car experiences rapidly escalating physiological crisis: hyperthermia progresses from panting and distress to collapse, organ failure, and brain damage. The process is terrifying — the animal cannot escape, cannot communicate effectively, and cannot understand why rescue is not coming. Death can occur within 30 minutes of reaching critical temperatures. The welfare harm is entirely preventable — no dog should be left in a parked car in warm weather for any duration.