As a responsible beekeeper, I try very hard to pay attention to my hives and make efforts to keep them from swarming. On my largest hive this spring, I have taken a split from it. (I didn't actually split the hive, but took frames of brood and eggs and made a split.) I also have been checker boarding the hive to give them the idea that they had plenty of room.
We had heavy rains in Atlanta. I moved in June of last year to a house, new to me. I just discovered in the last month that sometimes in the heavy rains, the back corner of my backyard and the back fence area of my backyard fill with water. The water literally came up to the bottom of the cinder blocks on which my largest hive - the one I've been checkerboarding like mad - sits.
Yesterday I took that entire hive apart all the way down to the cinder blocks and moved the cinder blocks forward the length of a cinder block.