(USA TODAY) Motorists in West Coast states are about to see a big spike in gasprices, the fallout from a fire that cut production at one of the region’s largest oil refineries.

Gasoline prices, now averaging $3.88 a gallon in California, $3.72 in Washington and $3.69 in Oregon, could surge to $4.15 to $4.25 a gallon over the next week to 10 days following Monday’s partial shutdown of a Chevron refinery in Richmond, Calif.

Nationally, gasoline prices have climbed 27 cents a gallon in the past month. While the refinery fire will drive prices along the West Coast, it will also lift the national average — now $3.65 a gallon — above year-ago levels.

  • Text smaller
  • Text bigger
Note: Read our discussion guidelines before commenting.