Is it illegal to leave children unattended in the car in California?

Yes, it is illegal to leave children unattended in a car in California under certain circumstances. The law states that children under the age of 6 cannot be left alone in a vehicle unless a person 12 years or older is present. Violating this law can result in fines and potential charges of child endangerment. Moreover, leaving a child in a vehicle can pose serious safety risks, including heat-related illnesses.