The school system said its decision was "based on information received from the National Weather Service and the Harford County Emergency Operations Center regarding dangerous weather conditions..."
Temperatures could feel like -17 with wind chill in Harford County on Tuesday, according to the National Weather Service. A wind chill advisory was in effect until 6 p.m., with the coldest temperatures expected midday Tuesday.
"Harford County is experiencing some of the harshest weather conditions we have seen in decades," Harford County Emergency Manager Rick Ayers said. "We are in the midst of a critical threatening situation due to below normal temperatures and wind chill....Hypothermia is a major concern, particularly for our elderly, the very young and homeless population."
While schools were closed for teachers and students, the school system was on code blue, meaning all school system offices would open on time.