Two house fires were sparked by a power surge early Thursday morning in an unincorporated area of DuPage County near Naperville.
ComEd and Naperville authorities are investigating what caused two outdoor electric meters to catch fire and several others in the area to overheat.
No one was injured.
Firefighters first were dispatched to a house at 25W282 Gunston Ave. near the intersection of Chicago Avenue and Naper Boulevard just before 6:30 a.m. A homeowner had reported smelling "electrical burning" and a loss of power to the house.
Upon arrival, firefighters discovered flames along the rear exterior wall of the house adjacent an electric meter. It was brought under control in 15 minutes, officials said.
While firefighters were battling the initial blaze, several other emergency calls came in reporting electrical fire odors and power loss.
As firefighters began investigating, they discovered a second fire at 6S242 Cohasset Road, immediately behind the first house that caught fire. Again, firefighters discovered the rear exterior wall on fire next to the electrical meter.
The fire had spread to the second floor of the structure, but was extinguished within 10 minutes.
Power was cut to the two houses that caught fire and three other homes in the area that reported the odors. Power was restored to the three houses that did not suffer any fire damage by 4 p.m. Thursday.
Both houses that caught fire have been deemed uninhabitable by the county's building department.