Sorry to hear that the wind had a field day with your hoop houses! You've got to stake them down, me boy! Seriously, if you stake one side or corner with a 12" leash, they won't go anywhere, and you can still tilt them up to water, etc. I'm sure others have had this problem, last week I had a hoophouse( hadn't staked yet), fly 100 feet and crash land! At least you still have some surviving "killer" plants!
I don't know why I didn't stake them should have known better.Could be strange forces at work though the seed from the dark side is in the ground as backup it'll be up tomorrow and already theres Thunderstorms forecast all over the U.K.