A propane delivery truck is pictured near Rutland, Vermont
A propane delivery truck is pictured near Rutland, Vermont January 26, 2014. A shortage of propane heating fuel during a brutal U.S. cold snap this month threatens to sharpen the year's most urgent energy policy debate. Millions felt the pinch last week as another wave of biting, bitter cold strained already low propane supplies in the Midwest, causing prices to surge three-fold over two weeks to record highs and forcing suppliers to ration deliveries. Picture taken January 26, 2014. To match Analysis ENERGY-PROPANE/USA REUTERS/Mike Segar (UNITED STATES - Tags: ENERGY ENVIRONMENT)