A seven-week-old puppy was left in a car at Narellan Town Centre in 40 degree temperatures on Saturday.
Macquarie Fields Highway Patrol officers were called to car park after a passer-by saw the distressed puppy locked inside the hot vehicle.
Police smashed a window to release the Staffordshire Bull Terrier puppy who was heat stressed.
The dog was given fresh water and recovered in front of an air conditioner.
The puppy was taken to Narellan Police Station and was collected by the owner’s landlady.
The puppy was not distressed or injured when it was collected.
NSW Fire and Rescue arrived at the car park about five minutes after the dog was removed from the car.
The inside car temperature was 65 degrees while the outside temperature was about 40 degrees.
Police are considering taking legal action against the owner.
Police want to remind residents not to leave children or animals inside an unattended vehicle, especially in extreme heat.