That is horrible. We have been in a few situations over the years, which have made me think about what to do while we are at camp. We have been at state parks where the sheriff has come through and sent everyone to the evacuation shelters (aka bathhouses). Come out to down trees, flooding, just a general mess, to no signs of any issues at all.
A couple years ago we had reservations at a state park, but there was a state wide shutdown, so our reservations were canceled (thankfully). The night we would have pulled in, at about the time I estimated we would have been setting up at, a large tornado hit the park. Luckily it was closed. It took 2 months for the state to partially reopen the park. If I recall correctly they said there was over 500 trees down over the main road into the park. They said the park manager was exhausted trying to walk, crawl over the trees just to get to the main gate to do an initial evaluation. What is very scary about that situation was; when we were making our reservations (months in advance) we were considering two different state parks on opposite sides of the state. Both parks were hit by large tornados that same evening, both were closed for months due to the damage