The number of extremely hot days in the U.S. may double

According to a new study from the Union of Concerned Scientists, an average of 36 days per year could feel like 100°F or hotter come the middle of the century. And toward the end of the 21st century, that number of days per year could jump to 54. “We basically are looking at increases in the kinds of conditions we’re seeing this week across the country,” said lead climate analyst for the UCS Erika Spanger-Siegfried, per The Guardian.  Currently, regions across the U.S. are experiencing heat waves, and …