It's an issue. Faster film is a good solution. So is a folding umbrella. I often block the wind with my body or stabilize the camera by resting a hand on the part that seems to be vibrating. Sometimes you just have to wait. If you've got high wind and fast moving clouds, this might mean waiting for the light to come from behind the clouds, for the cloud formation to be attractive, and for the wind to stop all at once. In some places it can be frustrating enough, that I just shoot a smaller format.