A human-caused fire estimated between 75 and 100 acres put out heavy smoke and flames near the border of Provo and Springville in Utah County on Thursday.
The blaze, dubbed the Milrace Fire, was burning near the 1400 North exit on I-15 in Springville, according to Utah Fire Info. It is in marshy terrain and phragmites, in conditions that made it difficult for fire crews to access. No structures or homes were threatened.
A thick cloud of black smoke could be seen billowing over the southbound lanes of I-15, and flames were visibly burning in vegetation on the west side of the freeway. Smoke from the fire was impacting visibility on I-15.
Just before 8:30 p.m., officials said the cooler evening temperatures and higher humidity reduced fire activity. People in the area may see smoke and occasional flames throughout the night, but crews plan to monitor the blaze and will reassess on Friday morning, Utah Fire Info said.
The cause of the fire is under investigation.