Trees remained on power lines Friday morning along Mercer Road, where a storm struck Thursday night.

Weather experts will visit Butler County to investigate multiple sites where tornadoes may have caused damage.

“At this point, it looks like there could have very well been a tornado,” said Michael Brown, a meteorologist for the National Weather Service of Pittsburgh. “We'll be able to confirm that today with the survey.”

Thunderstorms arrived in the county late Thursday evening, and some residents experienced heavy damage in isolated area.

Along Mercer Road, there were multiple trees that had fallen onto wires along the road. Some parts of Mercer Road were restricted to one lane because of debris still hanging on wires.

Mercer Road resident Chip Grubbs of Butler Township said he, his neighbors and Butler Township firefighters worked for hours to clear a large tree that had fallen onto the road.

“The neighbors really helped,” Grubbs said. “There were five people here, and they brought their saws.”

Grubbs said the effort cleared most of the road, but the tree remained on the line through Friday morning, until the utility company could come and inspect the site.

“I'm going to wait for them to clear this line, and then I'll cut it up,” he said. “I'll be here a while.”