I think your books are awesome and I was thinking of a couple disasters you might like.
Boston Marathon Bombing
The explosion of the factory in china
( I think that was where it happened. All I know is that it was big.)
The Challeger Spaceship Exploding
( Even though only the astronauts died it would be an amazing story from the kids point of view. Like if a family member worked at the control center.)
Hope you like my ideas
Nathan from New Hampshire