in the event that

used to indicate that something is being considered or planned for a specific possible occurrence or situation

In the event that the power goes out, we have backup generators to keep the hospital running smoothly.
Please make sure to save your work frequently in case of a computer malfunction.In the event that the system crashes, you won't lose any important data.
In the event that it rains during the outdoor wedding, we have tents available to provide cover for the guests.
We've established an emergency evacuation plan in the event that a fire breaks out in the building.
In the event that your flight is delayed, please notify us so we can adjust the schedule accordingly.