The national average for a gallon of gas could hit $4.50 soon, according to a leading fuel industry analyst.

"Ohhh yeah watch out folks... National average could quickly hit $4.50/gal," wrote Patrick De Haan, head of petroleum analysis at GasBuddy.

The national average rose to $4.23 on April 29, up from $4.02 a week earlier. De Haan attributed the climb to the ongoing U.S.-Iran conflict driving oil prices higher.

California has the highest gas prices in the nation, with drivers paying an average of $.98 per gallon on April 29. Hawaii, Washington, Oregon, and Nevada follow with averages above $5.00.