Yellow jackets are extremely aggressive ground nesting wasps. Some nested in the ground at the end of a wood storage rack where logs are collected until they are split for firewood. Last Wednesday my husband got stung half a dozen times. Not anaphylactic allergic (at least so far) but has issues so came inside to use his Epipen. Called the pest control service who sent a tech to deal with the yellow jackets the next day. As an aside - skunks like to dig up the nests and eat the grubs. Paper wasps chew wood and make those gray football size nests. Leave them alone and they will leave you alone. When they nest in the greenhouse, under the railing of the deck - sorry but I need to get them gone. Unlike bees who sting and die wasps can sting multiple times. And it hurts. Judy in New Jersey where high heat and higher humidity went away Saturday night so we had a lovely Sunday. But today (Monday) is again veering towards sticky.