Despite a recent streak of falling gasoline prices, and predictions of future lower prices, they’re on the way up again, with the average price of a gallon of regular unleaded gasoline hitting $3.58 on Monday, May 13, according to AAA’s most recent Fuel Gauge Report.

This price is 6 cents up from the previous week and up four cents from April 13. The company said the main drivers of these across-the-board price increases are tighter supplies and refinery maintenance (planned and unplanned) in the middle of the U.S. and on the West Coast.

AAA noted these price increases are occurring nationwide rather than on a regional basis, with only two states, West Virginia and Ohio, paying less for a gallon of gas than they did a week ago. Six states, including Oregon, Minnesota, Washington, Oklahoma, Nebraska, and Iowa, saw prices jump by 20 cents since last week and 13 states have seen prices increase by at least 10 cents.

The top 10 states with the highest prices on Tuesday, according to AAA’s report, included Hawaii, at $4.35; California and Alaska, at $4.04 per gallon; Illinois, at $3.99; Oregon, at $3.92; Washington, at $3.91; Minnesota, at $3.84; Indiana, at $3.79; North Dakota, at $3.78; and Michigan, at $3.78.