The Aston residence hall was evacuated at about 11:45 a.m. after carbon monoxide levels escalated, but no incidents of poisoning from the gas have been reported.
The D.C. Fire Department shut down a malfunctioning hot water heater in the residence hall, according to a Campus Advisory, and the fire marshal and health and safety units will remain on scene until the the building becomes safe for reoccupation.
The Aston houses GW Law School students.
