It was a scary moment for homeowners in the 1000 block of Weiser Street in Reading on Tuesday.
"I was working and they called me and said your house is on fire," said Wilnelia Delilosa, of Reading.
Delilosa rushed home to find her neighbor's house engulfed in flames and the fire spreading to her home.
Firefighters said the fire started just before 5 p.m. in the rear garage and spread to the first floor, where the kitchen is.
The fire was bumped to a third alarm as more crews were called in to battle the heavy smoke, flames and extreme heat.
"Due to the fire conditions, it very quickly exhausts a firefighter's air supply in that environment so that is why we needed additional fireman," said Lt. Jeremy Searfoss, Reading fire marshal's office.
The fire marshal's office called in the building inspector to make sure the building is structurally sound because there was significant damage, but Delilosa is just grateful her husband and three children, all under the age of five, are safe.
"Thank God that nobody got hurt, that my neighbor came out good. Everything was good and damage is damage," said Delilosa.
The fire marshal's office is just beginning its investigation and is trying to determine how the fire started.