I've never seen hives that big. Well done!
When I moved into this house 18 months ago, I opened the meter room and there was a very strong smell of gas. A massive hole in the gas pipe a few inches above the meter. I called the emergency gas service and we had to open all the doors and windows. Then they evacuated us (including the cat

) while they put a new pipe in. We could have been blown sky high if I hadn't have smelt it. Some people Can't smell North Sea Gas.
In Australia our heating system was run by oil.