It is extremely dangerous to leave a dog in a car in the summer. The interior temperature of a car can rise very quickly, creating life-threatening heat conditions for the dog, even if the window is slightly open. Dogs cannot sweat as effectively as humans and are therefore more susceptible to overheating and heatstroke.
If a dog remains in a hot car for an extended period, it can lead to severe health problems, including brain damage, organ failure, and even death. It is important to remember that the outside temperature does not even have to be extremely high for the temperature inside the car to rise very quickly.
If you must take your dog with you in the car, make sure he is never left in the car during the summer months. If you cannot take him to your destination, find alternative solutions, such as reliable dog care or boarding. Your dog's safety and well-being should always be your top priority!