"U.S. environmental regulators issued emergency fuel waivers on Tuesday to help alleviate shortages in reformulated gasoline in 12 states and the District of Columbia as supplies tighten five days after a cyberattack shuttered the nation's biggest pipeline.
The Environmental Protection Agency initially said the fuel vapor rule waiver would continue through May 18 for fuel sold in Washington, D.C., Maryland, Pennsylvania and Virginia, and that it may take other steps along with the Department of Energy (DOE).