"Rare Double Brood Emergence: Extra-Loud Cicada Invasion Hits Michigan and Illinois"
In a rare event, two massive groups of cicadas, Brood XIII and Brood XIX, will emerge simultaneously in the Midwest, with their loud calls reaching motorcycle-level decibels. Michigan State University Extension states that the cicada populations will be centered in northern Illinois and Missouri/southern Illinois, with their noise potentially heard in parts of southwest Michigan. The rest of the state will still hear the summertime song of annual cicadas, which emerge in smaller numbers and don't make as much noise.