ROUND ROCK, Tex. — Railroad tank cars sporadically burst into flame for a second day Sunday after 16 of 85 runaway cars derailed at a switch, setting off a fire that forced evacuation of about 5,000 people due to a threat of toxic fumes.
Railroad officials said a train crew apparently uncoupled the cars from a train on a sidetrack and they accidentally coasted on their own before derailing at the main track.
Officials said it appeared that one car initially caught fire after about a dozen overturned, and two others subsequently did.
Most of the evacuees returned home Sunday after the evacuation area was reduced. No injuries were reported.
Elsewhere, a derailment involving cars carrying flammable gas forced evacuation of a lightly populated industrial area at Everett, Wash., but there was no fire.
And at Scott Air Force Base, Ill., cleanup efforts neared completion Sunday at the site of Friday's derailment of at least 25 freight cars, including six tank cars loaded with hazardous chemicals.