In Fresno, gas prices have spiked up more than 23 cents compared to last week.
Gas was reported at $3.89 at the Sinclair and Arco stations in west Fresno Monday, just below the $3.90 average for Fresno for the day.
California's gas prices have risen almost forty cents in the last month. The average gallon of gas statewide costs about $4 statewide.
In the Central Valley, other prices are a bit cheaper with Merced reported with an average price of $3.21 and Visalia with an average of $3.74.