A system to alert and guide rescue personnel to a building is disclosed. The system is installed at a rooftop or sidewall of the building. The system comprises a sensor to detect fire in the building. Upon sensing, the sensor sends signal to a controller to activate an illuminating unit and a display unit. Subsequently, the controller instructs the illuminating unit and the display unit to pop out of the rooftop or sidewall of the building. Concurrently, the controller instructs a transceiver to send an alert to emergency personnel. When the emergency personnel try to reach the building, the emergency personnel can use the visual indication provided by the illuminating unit and display unit to identify the building and reach the building to rescue occupants of the building.