Earthquakes ... I had my fill of pretty bad ones from the faults at the base of the Carpathian Mountains.
As for floods, I was once at my grandmother's in the countryside when large rain made a dam close to the village rupture. Mind you, my granny's house is right at the edge of the flood plane so the house was not really affected much ... just a bit of water on the ground, halfway to the knee. The house is pretty raised from the ground by blocks, so the rooms were not flooded, but the cellar was done, as well as half of her garden plantation, including a couple of prune trees and half of our considerably large vineyard.
Mind you, that village didn't get hit very hard, the town across the river wasn't so lucky ... 2 meter deep water there ... straight in the flood plane. Unfortunately, floods are still a very real and always occurring problem in some areas of Romania ... and the government never does anything about it ... half the flood dams in the country are damaged beyond repair and they will never be repaired.