Feb 16, 2021 John Clanton/Tulsa World via AP A resident of Tulsa takes precautions against an icy windshield as a winter storm moves into northeast Oklahoma on Sunday, Feb. 14, dropping temperatures to single digits. DALLAS (AP) — A winter storm dropping snow and ice also sent temperatures plunging across the southern Plains, prompting a power emergency in Texas a day after conditions canceled flights and impacted traffic across large swaths of the U.S. Rotating power outages were initiated by the Electric Reliability Council of Texas, or ERCOT, early Monday morning, meaning hundreds of thousands went without electricity for short periods as temperatures fell into the teens near Dallas and 20s (about minus 5 degrees Celsius) around Houston.