Agencies across the Denver metro area have been responding to reports of a "natural gas or sulfur odor" that began overnight.
The smell has been acknowledged by the Denver Fire Department, South Metro Fire Rescue and the Douglas County Sheriff's Office. As of Sunday morning, no source has been identified by officials.
South Metro Fire Rescue said on X, formerly Twitter, that weather conditions could contribute to the smell.
"Temperature inversions can trap odors and are often to blame on cold mornings," the agency said. "Meters sometimes burp gas to regulate pressure and the mercaptan odor lingers."
Officials did not immediately respond to Denverite's request for comment.
Officials advise that if you smell gas outside, but do not hear hissing, there is no need to call 911. If you smell gas inside, call 911 immediately.
