People in Greater Cincinnati could be seeing the first signs of Brood X.
Cicadas will come crawling from their homes in the ground over a two-week period after the soil temperature has reached 64 degrees.
Gene Kritsky, a leading cicada expert and entomologist at Mount St. Joseph University, said Greater Cincinnati typically sees emergence in mid-May after two days in a row with temperatures above 80 degrees and there's been a "soaking rain."
"For the past couple of years, it's been the second day that our temperatures have reached the low 80s," Kritsky told the Enquirer.
But with the recent string of warm weather, Greater Cincinnati could be seeing some early risers before this week's cold snap.
Cicada mounds and what to look for
Kritsky said in late April, people will start to see mud chimneys after a heavy rain.
The cicadas live in tunnels underground and when the heavy rain floods their tunnels, the cicadas add an extension to get away from the rainwaters. Check under your deck, roof overhangs or under trees with heavy canopies for little mounds of mud.
You can also look for holes during this same time, Cicada Mania said. Cicada holes are about the size of a dime. But just because you see the hole, doesn't mean it's time.
"Cicadas preemptively dig holes to the surface and wait until the weather is nice enough for them to emerge. Sometimes you can see them down in the holes," Cicada Mania said.
If the cicada isn't in its hole, it might have moved on to find a tree to molt and harden. Five days after emergence, you should start to hear some singing.
As we get closer to May, stay on the lookout for their shells.
"The first signs of cicadas are often their shells (exuvia). When cicada nymphs come up out of the ground, they climb up the nearest tree or other tall surface, and shed their shells," Purdue University said.
Everything you need to know about Brood X:How long will they be around after they come out? When will they be back?