As brutal cold continues to blast much of the nation, a propane shortage is driving up heating bills, prompting accusations of price gouging and leading to energy emergencies in more than a dozen states. "They're worried they might not be able to keep those chickens warm," said Jeff Helms of the Alabama Farmers Federation. And consumers are grousing about higher prices. "It looks like there's some price gouging going on," said Phillip Wallace, director of schools in Stewart County, Tenn., which were closed Thursday and Friday because they were short on propane for heating classrooms. The district was due to...