The deadly danger of heatstroke is unfortunately often underestimated. Even at a mild 15°C outside temperature, the interior of an unprotected parked car heats up to 50°C and more. Also cars, which stood just still in the shade, can be seized after some time by the sun and become so the death trap for the dog locked in it. A window opened gap-width does not carry any cooling out. Within a very short time, the four-legged friend suffers a heat stroke, which unfortunately often ends fatally. More information here: