Billions of Brood X Cicadas Are Ready to Emerge After 17 Years Underground

If you live in the Eastern U.S., you may experience déjà vu in a few months. That's because the billions of periodical cicadas that make up Brood X will emerge from the earth for the first time in 17 years in the summer of 2021. When the soil hits 64º F this spring, the noisy insects will crawl up to the surface by the billions. The precise time they emerge depends on the weather, but locals will know when they do because their deafening mating calls can exceed 100 decibels — equal to a car stereo blasting at maximum volume. Fortunately, they won’t hang around long. Their reproduction cycle lasts just a few weeks, after which their bodies will drop back down into the earth. If you live in the following states, be prepared: Delaware, Georgia, Illinois, Indiana, Kentucky, Maryland, Michigan, North Carolina, New Jersey, New York, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia, and Washington, D.C.