 Fireworks likely caused two house fires in Montgomery County. Pete Pearinger with Fire and Rescue says in Aspen Hill, a person is without a home after fireworks sparked a fire causing more than $500,000 in damage. Homeowner was there sleeping. The smoke alarm activated. We're smoking the house. My neighbor called saying that the roof of the house was on fire. In the Wheaton area, he says discarded fireworks were left against the side of a house.