in the unlikely event of

in the unlikely event of something

 and in the unlikely event that something happens
if something—which probably will not happen—actually happens. In the unlikely event of my getting the job, I'll have to buy a car to get there every day. In the unlikely event of a fire, please walk quickly to an exit.
See also: event, of, unlikely
References in periodicals archive ?
In the unlikely event of any misunderstanding by customers or providers, our customers need only call the 800 telephone number on their membership identification cards.
And, in the unlikely event of a drive failure, the MediaVault's highly efficient RAID engine rebuilds failed drives in the background.
In the unlikely event of a disk drive failure, VideoRaid RTR/RTRX will continue to operate with no loss of data and at full performance.