Map shows where billions of cicadas will soon emerge in the US [Video]

Any day now, two massive broods of cicadas will emerge from the ground in a double emergence event that hasn’t happened in over 200 years. Billions — maybe even trillions — of these insects will be flying around, and now a map from the U.S. Department of Agriculture shows us exactly where this “cicada-geddon” will happen. 

The two groups are Brood XIII and Brood XIX. Cicadas have a periodical life cycle, only emerging from below the surface when they reach adulthood and temperatures are right. Some take 13 years to become adults, while others take 17 years. 

It is a rare event for cicadas with a 13-year life cycle and a 17-year life cycle to reach adulthood at the same time. Experts said this event will not happen again until 2245.

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Brood XIII (represented by a brown/green color on the USDA …