gregior
There are a lot of ill considered posts on here. Being a beekeeper means being responsible for your bees. If you can't move them and they are an immediate danger to the public....you've not much choice.
The preferred options are sealing the floor and entrance then CO2 fire extinguisher through the feed hole in the crown board.
or mist each frame of bees with 10:1 mix water and dishwasher liquid.
This is most humane.
or seal the floor/entrance and half a cup of petrol through the feed hole.
Good luck,
(Just off to club a few Seal calves.....