I can’t figure that out, we get cicadas every year........
We get cicadas every year, as well...but this brood is biblical. I remember 1987 and 2004 (I moved to Maryland in 1982). 1987 was loud in the distance..by 2004 I was living in a different area of Maryland and was absolutely gobsmacked at what was coming out of the ground. Luckily, I am not tooooooo skeeved out about it, otherwise there would be an issue. :). They were all over the doorways, over every toy in the yard, on the trees, in the trees, and they love car tires for some weird reason.
There is also an annual variety which are out now in summer here in Costa Rica. I don’t mind them as their racket cancels out my tinnitus at night so I sleep better.
But there’s a boom every 17 years. I think there’s a 13 year cicada, as well.