The western wind is quite strong in this area even at the ground level (Fehmrn Sound forms a part of one of the few comparatively open east-west corridors between the North Sea and the Baltic). The bridge is quite high, to accommodate fairly large ships. As a result, the wind strength at the bridge level is just incredible.
I mean, the bridge itself is sound, the handrails are tall and strong, so one of course could not be literately blown off the bridge by the wind. Nonetheless, the wind is so strong and unrelenting that you pray that none of the numerous ropes, lanyards, strings, and bungee cords that hold your kit together breaks: you feel that if it does, anything that has been held by it - your backpack, tent, camera - would surely fly across the roadway and into the Baltic Sea.