Some school heating systems in the Baltimore area are struggling to adjust to Tuesday's frigid temperatures.
Heating issues prompted two schools in the city and another in the county to close Tuesday.
Baltimore City Public Schools crews were working Tuesday to repair boilers at four schools, a spokeswoman said. Baltimore City College High School was closing at 12:15 p.m. Tuesday, while Dr. Martin Luther King Jr. Elementary/Middle School closed at 11:45 a.m. Tuesday.
Baltimore county school officials announced that one of its schools, Deep Creek Middle School, would also close early due to heating issues.
Both school districts, which have the oldest school infastructures in the state, have been at the center of debate about the conditions in schools in summer and winter months when students have to endure extreme temperatures.
Foster said work is also being done Mergenthaler Vocational-Technical High School, Northwestern High School in and Commodore John Rodgers Elementary/Middle School in Butcher's Hill, where boilers were not working at full capacity.
Temperatures could remain below the freezing mark Tuesday. The city's health commissioner issued a "Code Blue" advisory, urging vulnerable and homeless residents be sheltered.
Lows are expected to fall into the mid- to upper teens early Wednesday morning.