AUSTIN, Texas (AP) — Thousands of frustrated Texans shivered in their homes Thursday after more than a day without power, including many in the state capital, as an icy winter storm that has been blamed for at least 10 traffic deaths lingered across much of the southern U.S.

Even as temperatures finally pushed above freezing in Austin — and were expected to climb past 50 degrees (10 Celsius) on Friday — the relief will be just in time for an Arctic front to drop from Canada and threaten northern states. New England in particular is forecast to see the coldest weather in decades, with wind chil...