Due to the extreme cold temperatures, school districts have to monitor heating systems to ensure pipes don't freeze.
Scott Daniel, director of operations for Tiffin City Schools, said, typically, the buildings' heating is set back to 60 degrees overnight, but if the temperature is below 15 degrees, the temperature is left at 70 degrees.
"If there has been a place we have experienced a place that has frozen, we let the faucet drip, but typically we just keep heat in the building," he said.
Daniel said custodians in the buildings also check that there are no frozen spots.
During the summer, Daniel said, the maintenance department cleans and inspects the heating systems and boilers before the cold season.
Vanguard-Sentinel Career and Technology Centers have automated occupancy sensors so their temperatures are kept at a constant heat where pipes won't freeze, Superintendent Greg Edinger said.
If a sensor isn't working properly, an alert is issued and the problem is able to be fixed, he said.
Seneca East Local Schools also have sensors running 24 hours a day, said the schools' maintenance supervisor, Shawn Branham.
"The building is designed well, we program the boilers; when it gets to be around 5 degrees below zero and with the wind, we have to keep up with the demand of heat," Branham said.
He also said the outside of the building must be kept clear of ice and snow so the air intakes function correctly.
Carey Exempted Village School District has heating systems programmed to keep the building at 65 degrees at night.
In case of an electrical issue, the heating valve is opened to allow heat to flow through the system without electric for a short period of time for the problem to be fixed, said Stan Stombaugh, maintenance supervisor for Carey.