We won’t cry over spilled milk, but bourbon is another story.

During an early morning thunderstorm on Monday, June 17, 2019, the O.Z. Tyler Distillery in Owensboro, KY suffered a partial collapse of its rickhouse, AP reports.

Luckily, no one was hurt. However, Master Distiller Jacob Call reported that 4,000 barrels of bourbon were affected by the collapse. The warehouse holds about 20,000 barrels total.

At press time, it’s unknown whether the thunderstorm caused the collapse. Call says engineers will be inspecting the building to determine the cause.

This is the second bourbon warehouse to topple in the last year. In June 2018, Barton 1792 Distillery’s warehouse gave way; two weeks later, the other half came down, damaging a total of 18,000 barrels and leaking into a nearby stream.