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Smoke pours from a fire at the Chevron Richmond Refinery, seen at left behind Alcatraz Island as a catamaran sails by in San Francisco, Monday, Aug. 6, 2012. Officials have told residents of two Northern California cities to shelter-in-place as the fire in Richmond releases plumes of black smoke. The fire, first reported at 6:40 p.m. Monday, is burning in a process unit at the refinery, officials said. It is sending smoke over the cities of Richmond and San Pablo. (AP Photo/Eric Risberg)

Chevron refinery fire

Analysts expect West Coast gas prices to rise beyond $4 a gallon after a fire knocked out a key section of one of the nation's largest oil refineries on Aug. 6.