> A wall that size cannot possibly survive a big wind.
> Cannot.
A reinforced concrete should've been easily capable of withstanding a hurricane.
First thing I see is that roof was not attached to anything reinforcing in the wall, or columns.
It seems it solely relied on its weight, which was easily overwhelmed by wind, to keep it in place.
Hurricanes are kinda wimpy, though. Their main claim to fame is sustained winds. A tornado can pack winds pushing 300 mph. Good luck building a warehouse that can take a direct hit from that.
A Category 5 hurricane generally has wind speeds less than 200 mph.
EF5 tornadoes start at 200 mph, and can be well over 300 mph.
Could you design a warehouse (note: not a small storm shelter, but a warehouse, which by definition needs to have very large interior open spaces) that would withstand a 300 mph wind? Maybe.
The budget would be well beyond the reach of any non-military client, though.