Rehoboth Beach fire Company was alerted for a working structure fire on New Castle St. Upon arrival of the first unit smoke showing. Command 86 arrived with Deputy Chief Blizzard and established Command. A quick knockdown on the fire occured. Tower 86 crew ventelated the second floor while a primary and secondary search of the residence was conducted with negative result. Lewes Fire Company along with Bethany Beach Fire Company and Sussex County EMS 100 assisted in the alarm.