The fire was brought under control in a couple of hours this morning, but there's no word on possible damage to the 105-year-old Richmond refinery, which has a capacity of 225,000 barrels of crude oil a day and is Chevron's third-largest, according to Bloomberg News. Bay City News reported that the fire might have been connected to "leaky" equipment. Since a special, low-pollution process is required to refine gasoline in California, any disruption in the state's 21 refineries could have an impact on pump prices.

*Update: Chevron doesn't expect production to be impacted because the refinery was at the beginning of a planned maintenance cycle. But they still don't know the extent of the damage.