LYNN – A two-alarm fire ripped through a home at 220 Western Ave. Wednesday night, causing approximately $100,000 in damages.According to Lynn Fire Department Arson Investigator Dave Legere, the blaze broke out around 7:40 p.m. in the 2? story, wood-frame home. Three apartments are housed inside, in which five people and two cats call home. Two of the residents who were home at the time managed to escape with the cats and without injury.Crews battled the blaze for about 45 minutes, which Legere said was determined to have been sparked in an electrical outlet on the second floor.?We don?t know whether appliances caused the short or not, but at least a circuit breaker tripped and saved the fire from going any further,” he said. “What also stopped it from spreading was a 4 x 4 firestop in the wall. That thing was huge. If it wasn?t there, the fire would definitely have gone right to the roof and it could have been a lot worse.”A relative of the homeowner, who declined to give her name, said the two people who were home at the time smelled smoke on the second floor and heard the fire alarms going off.?When they checked out what was going on, they saw sparks and smoke in the basement,” she said. “It was very scary.”Legere said the smoke that the residents saw was actually being pushed downstairs due to the firestop.?The fire and embers didn?t have anywhere else to go but down, so it rendered the fire pretty harmless,” he said.Legere said the home was completely rehabbed a couple of years ago. Crews were said to have poked quite a few holes in the walls to get to the blaze. Residents of the home were displaced for the evening and an insurance company is expected to visit the home today for an inspection.