Double Cicada Brood 2024 Map. Billions of cicadas are expected to surface this spring as two different broods — one that appears every 13 years, and another every 17 years — emerge. A brood can contain more than one species, and all seven us periodical varieties will appear this spring.

The two cicada broods will emerge in a combined 17 states across the southeast and midwest, with an overlap in parts of illinois and iowa. They emerge once the soil eight inches underground reaches 64 degrees, expected to begin in.