Actually, you can vacuum out their nests and then drown what remains. You can also drop in some dry ice instead of drowning them. I've done this in the past when they have made nests in inconvenient places, like the planted strip in front of my house or, once, in a wall of my home.

However, what seems to work best is an ounce of prevention. Plastic bags of attractant that trap the wasps are commercially available. If they are placed out in the late winter/early spring they can catch the wasps who over-wintered and will be making those nests that are so aggressive come August.

Now if only we could get people in the PNW to understand the difference between bees and wasps.