If you leave your awnings out at night and or leave them out without tie downs, rest asured, you will return to this thread one day and reply with the following:
"Well, woke up last night to a thunderous crash. Does any one have a used awning arm or two for sale.........."
Or you can reply with:
"Woke last night at 3 am to the sound of a neighbor camper fighting his awning, had to help him straighten his awning arms and tube. Thank god mine was STOWED."
Tieing awnings down is a must especially if you are going to be away from your unit. Mind that wind not only can cause damage to your awning arms, even if it is tied down, it will cause stress at the awning rail. As Wahoo, siad the camp grounds in Myrtle Beach are ocean side, I have seen countless awning accidents there, even awnings that are tied down. It happens in a flash!
You can tie down your awnings at night and that will help with wind accidents but it does not take much of a midnight rain to weigh it down and bend the tube. Of course you can lower one end to prevent "pooling"
An ounce of prevention...........