That happened to my husband and 2 kids when we had just moved into our house up north,but with yellow jackets. The people before us never raked, mowed or cleaned the huge side yard. They were outside in the early evening and one of them stepped on a under ground nest. They got stung and ran into the house, yellow jackets following. Someone told my husband to go to the hole after it got dark, pour motor oil into it and seal it off with a coffee can. It worked. Hope your husband is OK