View Manhole fire in a larger map An underground electrical fire appears to be to blame for a plume of heavy smoke rising out of a manhole near the intersection of Warren Street and Wisconsin Ave. NW this afternoon. D.C. Fire/EMS was first alerted to the fire at about 1:30 p.m. on Tuesday, when a passerby physically knocked on the door of the Engine 20 fire station, located at 4300 Wisconsin Ave. NW, spokesperson Pete…