When I was a young lad, we took a caravan holiday on the south downs, not too far from Worthing. The wind was gusting up the hill side, and my father and elder brother decided they wanted to make a kite.
The dismantled the canvas toilet tent, and reconfigured it as a box kite. It took off with considerable force, so much that they decided to see if it would lift me! It did, but not very far.
The point being, it does not need a massive area of canvas in a wind to produce quite a lifting force. Now consider the size of an awning.
This point was ably demonstrated at a Scout camp Nr Southampton, where a troop wanted to move a mess tent, because the pouring rain had produced a rivulet running straight through it. The leader thought that if they unpegged it they could lift it and reposition it. It was un-pegged and it attempted to lift the 6 scouts holding it. They of course let go and it took off down the field ending in a pile of bent metal poles and ripped canvas. Fortunately no one was hurt.
Storm straps or lashing on an awning is a very good idea.