In strong winds, it is best to dis-engage the cylinders and engage the roof vent locks. Here is a brief list of what you need to do when you want to lock your roof vents. The roof vent openers need to be de-activated BEFORE you lock your roof vents. Locking the roof vents without this could cause damage to your auto openers and potentially damage your roof vents.
Remove the pin from the auto vent
Once pin is removed, lift the roof vent up slightly so that the cylinder drops out of the black cup
Unscrew the cylinder
Repeat on all other openers
Now you can lock them down to help prevent damage
Keep cylinders stored in a cool place until needed, cool in fridge before refitting
Remember to slide locks up out of the way when refitting cylinders
If you have difficulties removing the cylinder you could remove the bracket from the vent cross bar so the opener is not connected to the frame on the window sill (vent cross bar) the bracket will need re-fitting once ready for the openers to start working.