Gas prices are up slightly this week. Nationally, gas increased 4-cents a gallon to $3.61 and prices in Oregon increased 3-cents to $3.75. Triple-A's Marie Dodds says it's because of Hurricane Irene. The price increases are expected to be temporary and should continue slow declines after the Labor Day weekend.  The average price this week in Bend is about $3.96 for a gallon of regular.