Mike Raupp, an entomology professor, and colleagues collected more than 4,000 bugs off the side of a building in just 20 minutes.
"This was the week I think the floodgates opened," Raupp said in a news release. "We knew they were coming."
But not everybody has been inundated by the smelly pests.
Some places may be flooded with stink bugs while people 8 miles away see very few.
Fall also is the time of year where the stink bugs release an aggregation pheromone that attracts other stink bugs. Masses of them can be seen congregating on sides of buildings and other upright structures, much to the chagrin of homeowners.
The bugs also will try to move inside homes for overwintering.
Raupp warns against squishing them because they'll emit a cilantro-like odor. Instead, he recommends using a vacuum to suck them up, then sticking them in a bucket of soapy water or plastic bag and freezing them before tossing them into a compost pile.
"I kind of recycle these bugs once I off them," Raupp said in the release.
Other tips include caulking around windows, covering air conditioners and installing window-grade screens on the inside of attic and other vents.
For more information on how to keep stink bugs out of homes, view this light-hearted video titled, "Think before you Stink," from the Univeristy of Maryland.