This seems stupid. Why not wait until dusk, when they go into a torpor?
There you go...
This was a staged disaster that anyone could have done a better job of.
More important than the torpor, is the fact that all of them are at home. Wait until night and kill them all.
Because then the swarm will take off, and anyone within a few hundred yards that has (a) an open window, and (b) a light on inside the room, is going to get a swarm inside their house?
With a resulting huge lawsuit for Mr. Verret?