The United States Gasoline Fund LP ( UGA ) was up 7.8% at $30.61. Energy shares were mostly higher as Thursday's regular session ended, with crude oil prices , as well as gasoline prices, surging higher following Energy Secretary Rick Perry's comments to media reporters, saying that 30% of production at Texas refineries is off line in the wake of Tropical Storm Harvey. Light, sweet crude oil for October delivery was up 2.4% at $47.05 per barrel.