Drivers heading out for Memorial Day weekend are facing some of the highest gas prices in four years.According to AAA, gas prices have hit a four-year high. In Corpus Christi, the average price for a gallon of regular unleaded i s $4.13 a 25-cent increase in the past week. Premium gas in Corpus Christi is averaging $5.12 a gallon.Increased demand and the war with Iran are the main reasons for the higher prices.AAA says prices are expected to remain high as the summer travel season gets underway.For the latest local news updates, click here, or download the KRIS 6 News App. Catch all the KRIS 6 News stories and more on our YouTube page. Subscribe today! ...read more read less