Buffalo Firefighters responded last night at 2308 Hrs for a report of a structure fire on Ivy St. Engine 31 went on location with fire showing from the #2 & #4 sides of a 2 1/2 story dwelling. Ladder 14 requested an additional 1 & 1 (E33, L2) for an exposure problem. B-43 reported heavy fire 1st & 2nd floors with heavy fire in the rear of the attic. B-56 ordered all crews out of the structure and ordered defensive operations only. The fire was under control in 53 minutes.