Due to high wind speeds, the South Bay roll-up door was closed to mitigate the elevated dust levels in the LVEA. Normally, this door is kept open to purge air from the LVEA, but the increased wind speeds overcame the over-pressurised LVEA. Dust monitor levels have subsided to normal levels after the close just before noon.
Correction - The South bay man door (emergency egress) is used to purge dust.