A vehicle alarm system for inhibiting a passenger from being left in a vehicle includes a vehicle has a processor, a pair of rear seats, a theft alarm and door locks. The processor selectively generates an alarm sequence and the processor is electrically coupled to the theft alarm and the door locks. A plurality of pressure sensors is each positioned within an associated one of the rear seats. Each of the pressure sensors detects when a passenger is seated in the associated rear seat. The processor generates the alarm sequence when the vehicle is turned off and at least one of the pressure sensors detects the passenger in the associated rear seat. Moreover, the theft alarm is turned on when the processor generates the alarm sequence to alert that at least one passenger remains in the vehicle thereby inhibiting the passenger from is injured by heat exposure.