RICHMOND, Calif. (AP) - A major fire at one of the country's biggest oil refineries that sent scores of people to hospitals with complaints of breathing problems will push gas prices above $4 a gallon on the West Coast, analysts said Tuesday.
The fire, which sent plumes of black smoke over the San Francisco Bay area, erupted Monday evening in the massive Chevron refinery about 10 miles northeast of San Francisco. It was out early Tuesday, although officials were still conducting a controlled burn.
California's average price Tuesday for a gallon of regular gasoline was at $3.86.
The West Coast is particularly vulnerable to spikes in gasoline prices because it's not well-connected to the refineries along the Gulf Coast, where most of the country's refining capacity is located, analysts say.
The Chevron refinery is particularly big and important to the West Coast market, said Tom Kloza, chief oil analyst at Oil Price Information Service.
It produces about 150,000 barrels of gasoline a day - 16 percent of the region's daily gasoline consumption of 963,000 barrels, he said.
With inventories of gasoline in the region already low compared with the rest of the country, pump prices in California and elsewhere on the West Coast will soon average more than $4 a gallon, Kloza said.
Chevron spokesman Lloyd Avram said he did not have an update on when the refinery could be restarted and declined to comment on what kind of impact the shutdown might have on the gasoline market.
The fire began around 6:15 p.m. Monday, about two hours after a vapor leak of hydrocarbons similar to diesel, said Heather Kulp, a Chevron spokeswoman.
"At approximately 6:30 p.m., the volume increased and personnel evacuated the area," she said at a news conference Tuesday. "The hydrocarbon vapor then ignited and a fire occurred."
Kulp said there were no explosions, and staff at the refinery initiated an emergency response immediately after the fire started. The cause is under investigation.
The black smoke and flames from the fire could be seen for miles from the refinery that has long been the target of complaints and lawsuits by citizens who live near it in Richmond, a mostly low-income community that is host to five major oil refineries.
State workplace safety investigators cordoned off the entire crude unit, and no one was being allowed to enter without approval from the state, said Erika Monterroza, a spokeswoman for California's Division of Occupational Safety and Health, or Cal/OSHA.
Doctors Medical Center in San Pablo, a town near the refinery, said 181 people sought help complaining of eye irritation and breathing problems. The hospital said most of the patients were released after being seen.
Kaiser's Richmond Medical Center said it had assessed and treated more than 200 people with respiratory concerns in its emergency department. No patients were admitted to the facility, said Jessie Mangaliman, a spokesman for Kaiser Permanente.
Residents said they heard loud blasts around the time the fire broke out, although Chevron officials could not confirm those reports.
Daniela Rodriguez, 23, told the Contra Costa Times she heard a "big boom" and about an hour passed before she received an automated call from Contra Costa County to remain indoors.
"I was feeling kind of nauseous and light-headed" from the smell, she told the newspaper.
The blaze in the refinery's No. 4 Crude Unit was contained in about five hours, Chevron said in a statement on its website. Three employees suffered minor injuries and were treated at the scene, according to Kulp.