Updated at 7:23 a.m. ET
A fire at an industrial plant outside Oklahoma City sent flames 80 feet into the night sky overnight and prompted firefighters to evacuate homes up to four miles north of the facility.
Spokesman Mike Galloway of the Custer County Office of Emergency Management told CBS News early Thursday that no one was hurt and that the fire was mostly out. Employees of Danlin Industries were waiting for the smoldering to cool off before they could go in and assess the damage.
Galloway said the fire began around 11 p.m. ET Wednesday night after the plant was closed and the front gate was locked. He said the blaze then spread to containers of production chemicals, which is what sent huge fireballs into the air.
Firefighters didn't spray water on the blaze, choosing to let it burn instead. Galloway said there was no chemical runoff from the 13-acre site.
Danlin Industries is a major employer for Thomas, Okla., making production chemicals for the oil and gas industries. The containers were filled with chemicals intended to be trucked to local oil fields.
Authorities closed state Route 47 at the start of the blaze but opened it up around 5 a.m. ET.