Around 0545 hours Box 30-12 sent companies to 4218 Connecticut Avenue in Southwest Baltimore for a dwelling fire. Engine 30 went on location with a 2.5 story, occupied, wood frame with a working fire on the second floor. The fire involved a bedroom and flashed over causing members to retreat. A second alarm was struck and companies were quickly able to knock down the fire in about 10 minutes. One firefighter was treated for heat exhaustion. Seven occupants were able to escape safely after being awakened by smoke detectors.