U.S. meteorologists say an El Nino has formed. That's the natural warming of parts of the Pacific that changes weather around the globe. It is likely to a major factor in extreme and deadly weather across the planet for the next year or so. The one announced Thursday is expected to rival the record and costly 1997-98 El Nino. It is usually strongest in the wintertime, and it makes it incredibly likely that 2027 will set a record for the hottest year globally. The United Nations secretary-general says El Niño conditions will pour fuel on the fire of a warming world.

March has been the hottest month on record for the continental United States in 132 years, according to federal weather data. The National Oceanic and Atmospheric Administration reports that March's average temperature was 50.85 degrees Fahrenheit, which is 9.35 degrees above the 20th-century norm. This surpasses the previous record set in March 2012. Climate Central meteorologist Shel Winkley highlights the unprecedented nature of this heat, noting the sheer volume of records broken. More than 19,800 daily temperature records were shattered, and 2,200 places set monthly highs. Experts predict that a brewing El Nino could intensify global warmth.