A wave of reports has emerged from Northside, Clifton, and Camp Washington, where residents say a powerful, siren-like noise has been rising and falling unpredictably since December. Many told city officials the nightly disturbance is disrupting their sleep, straining their mental well-being, and even upsetting their pets.
“We were hearing this siren-like quality noise, whirring, oscillating, going up and down,” said Clifton resident Shaun Herold, who contacted local news outlet WKRC after the sound became impossible to ignore.
For Herold’s family, the confusion was immediate. “My son came up to me and said, ‘Dad, the tornado sirens are going off,’” he recalled. “Usually, it starts at about 10 p.m. It can go till 3 a.m., 4 a.m. But it’s quite unpredictable.”
The unpredictability is wearing on younger residents as well.
“It kind of stresses me out ’cause I don’t know what it is. It’s kind of scary,” said Herold’s son, Elijah.
Noise Varies Night To Night, Leaving Residents Searching For Clues

The hum doesn’t follow a pattern. Herold said he once spent an entire night documenting how often it started and stopped, noting that bursts of sound ranged from a few seconds to several minutes.
Other neighbors agree the noise doesn’t seem natural. “I feel like it’s definitely like a foreign sound,” Northside resident Brendan Marcum told WKRC. “Some nights it would be a little louder, some nights it would be a little quieter.”
Another resident echoed that feeling of unease, saying, “It kind of stresses me out because I don’t know what it is, and it’s kind of scary.”
Speculation Spreads Online As Frustration Builds
Hundreds of Cincinnati residents have taken to Reddit and Facebook to post recordings, theories, and mounting frustrations. The ideas range from industrial equipment to supernatural explanations, illustrating just how desperate the community is for clarity.
One Reddit user pointed to a familiar industrial suspect. “My favorite theory is River Metals Recycling,” they wrote, claiming the plant had previously relocated after residents near the original site refused to tolerate the noise from its metal shredder any longer.
Others believe a failing turbocharger on a diesel train engine at the nearby CSX Queensgate rail yard may be responsible. While the yard is known for loud mechanical activity, residents insist this particular noise is unlike anything they’ve ever heard.
WKRC reported that an anonymous source sent them recordings of a locomotive believed to be producing the troubling sound. However, a CSX spokesperson countered that claim, saying he “has not heard a noise like that on our property” and suggested it may originate elsewhere.
He added that any equipment requiring maintenance is “handled through established operating and mechanical protocols.”
A separate source told WKRC that rail crews have already reported the engine for excessive noise and expect it will be repaired.
City Officials Urge Residents To Report Incidents

As tensions grow, residents are hoping for answers. “We just hope to get to the bottom of it, figure out what it is, and if it’s, you know, a temporary thing or not,” Herold said. “And hopefully the community can rally if it’s not temporary, because it’s really impacting us.”
City officials advise residents to call 311, Cincinnati’s non-emergency line, each time the noise occurs. Meanwhile, concerned homeowners say they’re ready to keep pushing until someone identifies the cause.



