CLEVELAND -- FirstEnergy's outage map, at one point, showed more than 23,000 customers without power in Cuyahoga County on Thursday evening.
At just after midnight Friday, that number was updated to about 5,000, with most in Cleveland.
FirstEnergy tells FOX 8 News, they are investigating a potential problem at a substation.
The power outage comes as frigid temperatures continue to take hold in Northeast Ohio.
Stay with FOX 8 News and FOX8.com for new details.