Lewes (82), Rehoboth (86), Indian River (80), and Medic 104, were dispatched to a reported house fire in Midway Estates. Command 82 responded with 82-15 (Buckaloo), and was advised that the homeowners had a smoke condition in the residence. 82-15 arrived and established Command with conditions as reported. Crews found an electric blanket had caused a fire on a mattress. They extinguished the fire quickly with a water can and ventilated the structure.