An unseasonable warmup will continue to spread throughout most of the US this week, with high temperatures from Texas to the Midwest feeling more like May than the end of meteorological winter. Hundreds of temperature records – record highs and record-warm lows – are expected to fall through midweek, with Monday and Tuesday forecast to be the warmest days across the Plains and Midwest. On Monday, more than 250 million Americans will experience above-average temperatures. “This warmth is really beginning to build today across the middle tier of the country, and it continues to shift its way eastward by about...