Abstract: A safety system for passenger space in an enclosed vehicle includes a thermostat having a threshold temperature and an ambient temperature sensor in the passenger space to generate a signal representing the threshold temperature in the passenger space. An occupant sensor in the passenger space generates a signal representing the presence of an occupant of the passenger space. The system further includes a GPS locator, a radio transmitter and a controller. The controller receives the signal representing the threshold temperature in the passenger space and the signal representing presence of an occupant of the passenger space. It is in communication with the GPS locator and includes a timer measuring time from the ambient temperature signal exceeding the temperature threshold value, a timer threshold value and a signal output generator. A first output signal to the radio transmitter is generated which in turn is transmitted as an alert to a key fob.