Will Cicada Broods Emerge In 2024. Periodical cicada broods will spend over a decade underground, and will only emerge after either 13 or 17 years. The two cicada broods were projected to emerge in a combined 17 states.

For the first time in 221 years, this spring will see billions, if not trillions, of cicadas take to the skies in a rare. Maura losch and kavya beheraj/axios.