This page covers how to deal with honey bee nests and swarms, as well as who you can call for help.
Honey Bee Swarms
Note: Honey bees are generally not aggressive while swarming. Great care should be taken in treating the entrance to a nest as there is a risk of being stung. It may be advisable to do this operation at night when there is no bee activity.
Note: The problems caused by honey bee colonies that have had time to build a nest are not likely to be solved using insecticide alone because the honey store in the nest will continue to attract bees and wasps. The honey store must be removed or sealed up following destruction of the colony.