When refinery problems occurred at four facilities in the San Francisco bay area on April 29, gas prices reached what would be their highest points of 2014 in both California and the United States. California's average price per gallon reached $4.26 while the national average rose to $3.70.
By the last day of 2014, national average gas prices were $1 lower than they had been at the start of the year. The final six months of 2014 saw a steady decline in gas prices due to a boom in U.S. energy, especially in areas such as the Bakken region in North Dakota, the Permian Basin in west Texas and the Eagle Ford shale region of eastern Texas. This boom brought domestic fuel production to its highest level since 1986.