What's the worst storm you have been in while camping?

I wasn't there when it happened. On August 31, 2014, a strong wind storm, possible tornados (I heard three or four tornados touch down). I was in Denison watching the storm to come through then later that night I heard the Yellow Smoke campground got hammered by strong wind (70 mph) overturn five campers down and a lot of damages. They all parked by water with no trees in front of campers, that is how the wind knock them down. The rest of campground are ok, no damage. Nobody were injured.