"I'm fairly sure we're in for stormy weather because ants are attempting to invade our home"
Chemical warfare is justifed.
LOL. Allergies prevent my use of chemicals anymore than I must. I vaccum them up instead. They don't seem to survive the windstorm nor the trip thru the filter. Live ants go in, dead ants come out.
There are houses now but we used to have an empty field behind our house. You could tell when something up. Rats, snakes and rabbits would come visiting.