The pool most likely will be it’s own unit and not rigidly connected to the buildings so it essentially can slide between the two buildings. The buildings are

The pool most likely will be it’s own unit and not rigidly connected to the buildings so it essentially can slide between the two buildings. The buildings are relatively low and wide so I don’t think they’ll flex much in the wind but the soil can definitely shift under them and eventually they might drift apart too far for the tolerance of the pool’s suspension. If a the glass shatters it doesn’t going to matter where the hole is if you are in the water you’ll most likely going to get sucked through before you know what happened. I would also be worried much more about the glass shattering due to stresses from thermal expansion or even vibration over time than the buildings flexing. I’ve seen large panels shatter across quite a few installations in London because the frame was a tad out of spec and the temps dropped below zero.