Bridge Collapse

Yesterday in the Twin Cities a bridge collapsed. This is only 80 miles from where we live. Mommy and Daddy were stuck on the TV keeping up to date on all the things going on. It was hard to watch and have your kids watch with you. It was like 9/11 news coverage all over again. However, the trauma isn't so severe.
My problem is explaining the whole ordeal to my kids when we drive over a bridge. Jack, has been up too many nights worried about a fire in the house ever since a pre-school visit to a fire station where they warned about fire safety. Then we go to the Black Hills and see numerous hillsides blackened from fire in the recent weeks. Then a 600 acre fire while we were there. So sleeping that night was a little sparse with him. But eventually he fell asleep and stayed asleep. I am worried about the dreams and visions they will have after seeing this bridge fallen into the Mississippi River. As I write this and think, I stop and wonder if this feeling of mortality with the fires and bridges will help them consider their own mortality and keep them from acting like Superman (Grandma B remembers) or any other invincible hero.
Until the next trip to the hospital, I will keep my fingers crossed.