OMAHA, Neb. (AP) — A warm front swept springlike weather across a large swath of the country Sunday in what is usually one of the coldest months of the year, sending people out of their homes to enjoy the rare winter respite but also bringing increased wildfire danger.In Omaha, Nebraska, the temperature Sunday broke 65 degrees (18.3 degrees Celsius) on a day when the average high temperature is around the freezing mark, according to the National Weather Service.“Omaha is having its second warmest February on record in its 154-year history of…