TRENTON, N.J. — Motorists are seeing sharply higher prices at the pumps in New Jersey, thanks to Hurricane Harvey.

AAA Mid-Atlantic says the average price of a gallon of regular gas in the state on Friday was $2.55. That’s up 18 cents from last week.

Motorists were paying $2.01 for gas at this time last year. A 23-cents-per-gallon gas tax increase went into effect Nov. 1.

The price spike is due to flooding from the devastating storm that began knocking out refineries along the Texas Gulf Coast last week. It also ends a three-week stretch where gas prices have fallen in New Jersey.

The national average gas price Friday was $2.52, up 17 cents from last week. That’s also higher than the national average from a year ago, when motorists were paying $2.22.