Some residents who earlier had been forced to evacuate have returned to their homes.
No injuries were reported after about half the cars on the 62-car train derailed in a rural area about 50 miles south of Toledo, said Capt. Jim Breyman of the Arcadia Fire Department. He estimated about 8 cars - each carrying more than 30,000 gallons of ethanol - exploded and caught fire early Sunday morning. In all, 28 cars were burned in the fire, he said.
The train was headed from Chicago to North Carolina and loaded with ethanol, said Norfolk Southern spokesman Rudy Husband. He said he had no information on what caused the derailment.
The fire was subsiding, and most of the ethanol was expected to be burned off. Breyman said three or four cars were still burning, but those were expected to be out as soon as early Monday morning.
Breyman initially said he thought the fire would take longer to go out, but he said the railroad company's crews are hoping to get the burned cars off the track so they can work to get trains moving through there again.
The railroad company has started removing some of the burned cars from the track, he said. The cars not involved in the derailment have already been taken away from the area.
"I feel pretty safe that things are getting a lot better," Breyman said.
The U.S. Environmental Protection Agency is monitoring the air quality in the area.
Some ethanol got into the mouth of a nearby creek, but was being contained, Breyman said. He said he did not know how much had gotten into the water.
Carol Hester, a spokeswoman for the Ohio EPA, said absorbent materials have been placed into the water to keep the ethanol from moving in the stream. She said the agency was monitoring the waterway.
Authorities were called to an intense and dramatic scene at about 2:15 a.m.
"We're talking fireballs," Breyman said of the explosion. "When they went thousands of feet in the air, they could be seen from 20-plus miles away."
About 20 homes had been evacuated in the area about two miles west of the village of Arcadia. At least six houses were still evacuated by mid-afternoon Sunday, Breyman said.
Breyman said cars are stacked three- or four-high in some places, and are melted. Others are lying on their sides, but not burning.
"We're not talking huge large fires at this point," Breyman said. "Compared to what it was, it's really very mild."
Authorities initially were concerned that the derailment and explosions happened next to a fertilizer plant. Breyman said it was fortunate the fire didn't spread there.
Associated Press writer Sofia Mannos in Washington contributed to this report.