(Bloomberg) The bitter chill that toppled Texas’s power grid and broke records across the Great Plains has retreated and likely won’t return.Temperatures across the Midwest, South and most of the East Coast will likely linger 3 to 5 degrees Fahrenheit (2-3 Celsius) above normal through Feb. 27. While the West will remain colder into early March, the worst of winter is over.“It’s safe to say ‘all clear’ on that caliber of cold,” said Matt Rogers, president of the Commodity Weather Group LLC. “But we do believe some colder periods could still return later in March for some above-normal heating demand at times.”A blast of sub-freezing temperatures ripped across the U.S. into Mexico last week when the polar vortex the girdle of winds that bottles cold in the Arctic weakened. The record-breaking freeze overwhelmed Texas’s grid, leaving millions without lights, heat and, eventually, water.In the last 30 days, 9,614 d