1 person was treated for smoke inhalation but declined transport to the hospital after a fire at the Rivian plant in Normal. The Normal Fire Department says firefighters were already at the plant for an unrelated incident when the fire broke out around 11:30 a.m. Thursday. The fire was quickly extinguished with fire extinguishers. Employees were evacuated but have since been allowed back in. The fire started under a section of the conveyor that moves the vehicle chassis down the assembly line on the western side of the building. The exact cause is unknown. The department says the fire did not involve a vehicle or battery components. Damage was contained to the area where the fire began. It took an extended amount of time to ventilate the smoke from the building due to the plant’s size.