Maybe I give the wind too much credit, but I've always wondered how hard does the wind have to blow to cause stacked hives, such as Warre and Langs, to blow over? I've only got one hive and it's a TBH. Obviously, they have to be generally pretty stable, or else the designs would have been abandoned or changed long ago. But the tall, skinny Warre's seem particularly top heavy and vulnerable. Where I live in the Eastern Panhandle of WV, we get some impressive wind (not just storms, but just windy days) that regularly blows over driveway basketball goals and pulls siding and gutters off of houses.