SISSONVILLE, W.Va. (AP) - Four homes went up in flames and collapsed in charred heaps Tuesday after a natural gas line exploded in an inferno that raged for at least an hour, melting guardrails and pavement on a swath of Interstate 77.
Five other homes had extensive external damage, and several people were treated for smoke inhalation, but authorities said there were no fatalities and all residents had been accounted for.
"We've been very fortunate," said Gov. Earl Ray Tomblin, who toured the damage then briefed the media. "They were just lucky enough not to be home."
Flames from a gas line explosion burn across Interstate 77 near Sissonville, W.Va., Tuesday.
Most were at work. One man had just left to go hunting, he said.
State Police spokesman Sgt. Michael Baylous said a slight risk of a secondary explosion remained, so people who had initially been told to stay inside nearby homes were later urged to evacuate.
The explosion occurred between Sissonville and Pocatalico just before 1 p.m. in a 20-inch transmission line owned by NiSource Inc., parent of Columbia Gas. The gas flow was shut off, but State Police 1st Sgt. James Lee said there was still pressure on the transmission line.
Kent Carper, president of the Kanawha County Commission, said flames had been shooting 50 to 75 feet into the air before the fire was extinguished.
"It sounded like a Boeing 757. Just a roar," he said. "It was huge. You just couldn't hear anything. It was like a space flight."
Trevor Goins lives about a half-mile from the explosion and was watching television in his apartment when he saw a ripple in his coffee cup and the floor shook.
"I thought possibly (it was) a plane crash," said Goins, who immediately went outside with several neighbors. "It was so loud it sounded like a turbine engine. You almost had to put your hands over your ears."
He got in his car and drove closer, seeing fire that stretched as high as the hilltops.
"The flames were so high, they were so massive," he said. "I could only imagine what had happened."
Carper said the flames spanned about a quarter of a mile and ran through a culvert under the interstate.
"It actually cooked the interstate," he said. "It looks like a tar pit."
Tomblin said a roughly 800-foot section both directions was baked by the heat.
"It turned the asphalt to cinder," he said, after walking across it. "Your feet were hot. It was like walking on a volcano."
Federal and state investigators are now trying to determine the cause.
"It's one of those rare events that happen," the governor said, "and at this time we do not have those answers."
NiSource spokesman Mike Banas said the company was still gathering facts.
"Our first priority is the safety of our employees and the community," he said, adding that no impacts on customers are anticipated.