The Arctic cold blast that swept through the southern U.S. in February caused a much bigger loss in oil supply than previously estimated, with output falling to a three-year low. A report from the Energy Information Administration shows drillers cut production by almost 1.2 million barrels per day in February, a much bigger hit than previously reported. U.S. production for February was down 10 percent from January, and was 22% lower than a year earlier. The cold snap shut down the power grid and other infrastructure including a brief shutdown at the HollyFrontier refinery in El Dorado February 18, according to reports under the refinery's current Consent Decree. The EIA report shows a big drop in Kansas output in February as well. Production averaged 66,000 barrels per day, a 12% drop from January and 25% lower than February of 2020.