Mourning for someone you don’t know

My grandma is a secretary at a high school, last night, two of her kids died in a car accident. I’ve always cried over deaths of people, even family I had never met. My grandma is the sweetest person in the world and she loved her students, my heart aches for her. I’ve gotten good with grounding but I fear nothing can help this feeling. It hurts to know that those students will forever be seniors.