Sirens، To dream of sirens represents a sense of urgency to deal with a problem at hand. You or someone else that feels attention must be drawn to an issue. A situation that you feel is an immediate priority. Being alerted to a problem.
Negatively, a siren may reflect feelings of stress, frustration, or too preoccupied with planning for an emergency.
Example: A woman dreamed of hearing sirens. In waking life she was pregnant and having anxiety about the day she would go into labor.