No, it is not safe to leave a dog in a parked car, especially in warm weather. The temperature inside a car can rise rapidly, even on mild days, putting your dog at risk of heatstroke, which can be fatal. For example, on a 70°F day, the temperature inside a car can reach 100°F within 20 minutes. Additionally, dogs can experience anxiety and stress when left alone in a car, which can lead to destructive behavior or attempts to escape. If you must run errands, it's best to leave your dog at home or bring them with you if it's safe to do so. Always prioritize your dog's safety and well-being.

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Topics covered in this question:

Dog Behavior Dog Safety Pet Care Heatstroke Car Safety