On the day of the first apparition at Medjugorje, July 24, 1981, the local post office was set on fire after being struck by lightning.
Then there are the regular earth tremors in the region. I was in Medjuorje at one time when a tremor caused pilgrims to exit some of the shops very quickly. A friend of mine was in the church at the time and said the tabernacle shook.
If you want to keep track of the tremors in the region, check out this website: https://earthquaketrack.com/p/bosnia-an ... ina/recent