The interval from June via August this yr was the hottest on report in the United States, exceeding even the Dust Bowl summer season of 1936, the National Oceanic and Atmospheric Administration mentioned on Thursday.
The common temperature this summer season in the contiguous United States was 74 levels, exceeding by lower than a hundredth of a level the report set in the summer season of 1936, when scorching warmth led to the demise of 1000’s of Americans and catastrophic crop failure.
Five states — California, Idaho, Nevada, Oregon and Utah — reported their warmest summers on report, NOAA reported, whereas 16 different states reported “a top-five warmest summer on record,” the company mentioned.
The common temperature in the United States via August this yr was 55.6 levels, NOAA mentioned, 1.eight levels above the 20th century common and the 13th warmest to this point for that interval of the yr.
On Thursday, many areas in the West remained underneath an extreme warmth warning, together with parts of Southern Nevada, Death Valley, the Colorado River Valley and japanese San Bernardino County, Calif., the National Weather Service mentioned. Temperatures have been anticipated to vary from 105 levels in Las Vegas to almost 120 levels in Death Valley.
While tying a single warmth wave to local weather change requires in depth attribution evaluation, warmth waves round the world are rising extra frequent, longer lasting and extra harmful. The 2018 National Climate Assessment, a serious scientific report issued by 13 federal businesses, notes that the variety of scorching days is rising, and the frequency of warmth waves in the United States jumped from a mean of two per yr in the 1960s to 6 per yr by the 2010s. Also, the season for warmth waves has stretched to be 45 days longer than it was in the 1960s, in accordance with the report.
It is all a part of an general warming development: The seven warmest years in the historical past of correct worldwide record-keeping have been the final seven years, and 19 of the 20 warmest years have occurred since 2000; worldwide, June 2019 was the hottest ever recorded and June 2020 primarily tied it.
NOAA included the particulars of this summer season’s record-setting temperatures in its month-to-month local weather report, which it issued close to the finish of a summer season of maximum climate occasions in the United States.
Hurricane Ida made landfall in Louisiana on Aug. 29 with sustained winds of 150 miles per hour, making 2021 the second yr in a row that a Category four hurricane slammed the state, NOAA mentioned.
Three days later, Ida’s remnants tore throughout the Northeast, inflicting lethal flash flooding that was blamed for dozens of deaths. Ida adopted quickly after Tropical Storm Fred triggered flash flooding and touched off a number of tornadoes in the Southeast, and after Tropical Storm Henri introduced fierce wind and torrential rain to a lot of the Northeast.
Water wasn’t the solely drawback. Wildfires devastated giant swaths of California. The Dixie Fire, which began in July, has destroyed greater than 927,000 acres and is now the second largest fireplace in the state’s historical past, NOAA mentioned. The Caldor Fire additionally grew shortly in August and threatened communities southwest of Lake Tahoe in California.