I saw a video from a Dutch military plane over St. Martin, post Irma. It seemed a lot of structures were still standing, but badly damaged.
One thing I noticed was that some large hotels, evidently with concrete floors and dividing walls, seemed to be just gutted, as though the wind blew out the windows and swept the interior bare. Maybe I got this wrong, but that’s the impression I got. Very scary.
While watching footage, I didn’t notice hurricane shutters on the hotel windows either.
In a strong wind, there is pressure on the windward side and suction on the lee side. If there are adequately designed frames for wind pressure, the same may not hold true for the lee side.
Also, although the frames may be designed for resisting the deflection, if there are inadequately fastened to the structure, the whole frame, glass and all can be moved. That is to few or too small attachment fasteners will allow failure.