If a hurricane's path or history has been unusual or erratic, the warning may be issues only a few hours before the beginning of hurricane conditions. At this point there is absolutely no time to waste. Immediately install hurricane shutters, if present. Board windows, as previously described, if possible. Brace double doors and garage or loading dock doors.
Limit building access to one or two points s the others can be shut down.
Silicone caulk will easily peel up afterwards. Take down awnings and other items which may blow away. Obtain several hundred dollars in petty cash for post-hurricane emergency supplies. Take half of your institution's vehicles to a public parking garage. While they may be damaged by flying debris, these facilities are typically well built and are likely to withstand even major hurricanes.