The Lundberg Survey says gas prices increased more than five cents a gallon in the past two weeks.
As of Friday, the combined national average for all grades of gas hit $1.94 a gallon.
Trilby Lundberg says, "Most of this is hurricane-related."
She cites damage to petroleum facilities in the Gulf of Mexico, as well as shutdowns because of concerns about possible damage. Lundberg says she expects prices to stabilize shortly, or even slip.
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