Ameren Illinois reported thousands of customers were without electricity in Monmouth and surrounding communities in Warren and Henderson counties.
“The tornado caused significant damage to the town”, including numerous power lines down and several gas leaks, Illinois State Police said in a statement.
Residents returning to survey structural damage were turned away by police, KWQC-TV said.
A tornado swept through the towns of Kirkwood, Monmouth and Cameron late Thursday. A Cameron resident told the station his home sustained damage, including blown out windows and a destroyed pool.
The National Weather Service says it first received reports of damage late Thursday as strong winds swept between Galesburg and Monmouth in Warren County. “Illinois State Police is already at the scene and we have staff from the Illinois Emergency Management Agency enroute to the area to support local response efforts”.
Cameron, Illinois was hit hard by a tornado on the evening of July 16, 2015. The agency has been put on alert and is in position to provide assistance to the area if it is needed.