First time for everything. Over fourteen years here, first time I've run into an evacuation drill. (Employees only, though a few of the guests joined in to be on the safe side.) In my office I could barely hear the siren go off, and that was with the door open. I heard a periodic voice recording but couldn't make out what it said.
Apparently, my job is to make sure the safe is closed & locked before heading to the meeting point at the top of the loading ramp. If I'm in the middle of a deposit, throw it all in the safe first, sort it out after they let us back in.
On the up side, HR was waiting outside with popsicles for everybody.