Last month was the hottest March on record for the Lower 48 states, by the most for any month ever, federal data shows. And a forecast El Niño could heat Earth even more.
Washington — March's persistent unseasonable heat was so intense that the continental United States registered its most abnormally hot month in 132 years of records, according to federal weather data. And the next year or so looks to turn the dial up... [4762 chars]