Last Updated 10:15 a.m.
LAWTELL, LA. About 100 homes remain evacuated as officials work to clean up the site of a 26-car train derailment near the small community of Lawtell, about 60 miles west of Baton Rouge.
State police say crews are working Monday to clear U.S. 190 which is blocked by the accident. The Union Pacific train went off the tracks Sunday afternoon.
A company spokeswoman says one of the rail cars was leaking sodium hydroxide, which can cause injuries or even death if it's inhaled or touches the skin. The other was leaking lube oil. But state police say the leaks were contained.
There were two people on the train, an engineer and a conductor. They were not hurt.
One person went to the hospital complaining of eye irritation.
CBS Baton Rouge affiliate WAFB reports that 14 of the derailed cars contain potentially hazardous materials. Crews are working to dig ditches to contain the chemicals, and offloading them is a possibility, the station says.
Master Trooper Daniel "Scott" Moreau said the leaks were contained and the amounts were so small air pollution detectors have not picked up anything, but homes within about one mile of the derailment were evacuated as a precaution.
"We have the hazmat team from Union Pacific, and state police hazmat are on location right now, assessing the damage," he said.
Gov. Bobby Jindal flew into St. Landry Parish on Sunday night. "Anytime you have chemicals leaking into the environment, that's a serious issue," Jindal said. "Nobody knows the extent of the damage. We'll get that in the next 24 hours."
Another damaged car was carrying vinyl chloride, Espinoza said, but it was not leaking. Vinyl chloride is extremely flammable.
Espinoza said a man who was near the derailment initially did not want to go to the hospital in an ambulance, but decided later to go get checked out for a burning sensation in his eyes.
"We're bringing in equipment to make sure we move all of this in the safest manner," Espinoza said.
The railroad company says it doesn't know what caused the derailment. Espinoza said the railroad ties were renewed in 2011 and the track was inspected about three hours before the accident.
The track runs parallel to U.S. Highway 190. State police said it would be closed for at least two days. Traffic was also being diverted from the evacuation zone.
St. Landry Parish President Bill Fontenot said evacuated residents could go a theater the local government owns if they needed a place to stay. The Delta Grand Theater has no fixed seating, so cots can be easily set up, he said.
"I think we've got about 30 individuals there now. Some are still trying to find relatives or friends" to stay with, he said late Sunday.
© 2013 CBS Interactive Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.