Emergency signals are specific sounds, lights, or messages used to alert people to a dangerous situation. These signals can include sirens, flashing lights, or specific codes that indicate the type of emergency, such as a fire or a natural disaster. They are designed to grab attention quickly and inform individuals to take immediate action for their safety. Common emergency signals include the fire alarm, which emits a loud sound to warn of a fire, and the emergency vehicle siren, which alerts drivers to clear the road. Understanding these signals is crucial for ensuring a prompt and effective response during emergencies.