The child may not want to be out of the parent's sight. Become afraid of loud noises, rain, storms. Not show any outward sign of being upset. Some children may never show distress because they do not feel upset. Other children may not give evidence of being upset until several weeks or months later.
Children are mirrors of their parents.
Your calmness or stress can be reflected in how they behave. Involve children in safe, routine activities such as finding extra blankets for beds or preparing snacks. This makes them feel a part of the family. This is normal if a child is scared or doesn't understand the situation. An extra amount of understanding and patience is usually necessary.