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  •  science >> Vetenskap >  >> Naturen
    Kalifornien och västvärlden härjar i rekordhög värmebölja

    Freddie Ramirez, till vänster, överlämnas en flaska vatten från Kim Burrell i Sacramento, Kalifornien, tisdagen den 6 september 2022. Burrell och Debbie Chang, osedda, delade ut vatten och snacks till dem som de finner behövande på gatorna . Temperaturerna i Sacramento-området förutspås nå rekordnivåer på tisdag. Kredit:AP Photo/Rich Pedroncelli

    En rekordhög värmebölja gjorde livet surt i stora delar av väst på tisdagen, med Kalifornien som sträckte sig in i sin andra vecka av överdriven värme som beskattade statens elförsörjning med rekordstor efterfrågan och förde det farligt nära att beställa strömavbrott medan människor var försöker desperat hålla sig cool.

    California Independent System Operator, den enhet som övervakar statens elnät, utfärdade en steg 3-varning som låter den dra på nödkraftskällor. Varningen är ett steg under för att faktiskt beställa roterande strömavbrott.

    CAISO sa att den högsta elefterfrågan på tisdagen nådde 52 061 megawatt, långt över det tidigare högsta på 50 270 megawatt som sattes den 24 juli 2006.

    Efterfrågan sjönk när skymningen föll, företag stängde och CAISO skickade ut ett meddelande på sin mobilapp där kunderna uppmanades att dra ner på användningen och varnade att "strömavbrott kan inträffa om du inte vidtar åtgärder."

    Steg 3-larmet avslutades vid 20.00. utan avbrott. CAISO tackade kunderna och twittrade att "konsumentbevarande spelade en stor roll för att skydda elnätets tillförlitlighet."

    Även utan avsiktliga strömavbrott befann sig dock tiotusentals människor utan ström i norra Kalifornien.

    Cirka 35 700 människor förlorade elektriciteten i Silicon Valley och södra och inre områden i San Francisco Bay Area och de flesta avbrotten var värmerelaterade, sade Jason King från Pacific Gas &Electric på tisdagskvällen. Det fanns inget besked om när strömmen skulle återupptas.

    Freddie Ramirez, till vänster, överlämnas en flaska vatten från Kim Burrell, i Sacramento, Kalifornien, tisdagen den 6 september 2022. Burrell och Debbie Chang, till höger, delade ut vatten och snacks till dem som de finner behövande på gatorna . Temperaturerna i Sacramento-området förutspås nå rekordnivåer på tisdag. Kredit:AP Photo/Rich Pedroncelli

    Tidigare under dagen uppmanade den demokratiska guvernören Gavin Newsom invånarna att bevara och varnade i ett videomeddelande att "risken för avbrott är verklig och den är omedelbar."

    "Denna värmebölja är på väg att bli både den hetaste och den längsta någonsin för delstaten och många delar av väst under september månad," sa Newsom. "Alla måste göra sin del för att hjälpa till att ta steget i några dagar till."

    Kaliforniens Department of Cannabis Control uppmanade marijuanaföretag att stänga av sina lampor och ström eller använda en reservgenerator.

    Kaliforniens delstatshuvudstad Sacramento nådde den högsta tisdagen genom tiderna med 116 grader Fahrenheit (46,7 grader Celsius), vilket slog det tidigare rekordet på 114 F som sattes i juli 1925, enligt National Weather Service.

    Sacramento-infödda Debbie Chang var ute och gick i Capitol Park på tisdagsmorgonen och drog en vagn med Pop-Tarts och vatten för att dela ut till hemlösa. Hon bor i ett gammalt hus som förlitar sig på väggmonterade enheter som hon säger inte fungerar så bra. Temperaturen nådde 91 grader (33 C) i hennes hus måndag kväll.

    Debbie Chang, right, hands a bottle of water to a man on the street in Sacramento, Calif., Tuesday, Sept. 6, 2022. Chang and Kim Burrell, unseen, passed out water and snacks to those they find in need on the streets. Temperatures in the Sacramento area are forecasted to reach record highs Tuesday. Credit:AP Photo/Rich Pedroncelli

    "The past few years in California, it's really rough," she said. "I really love this state. And growing up I never imagined I'd exactly want to live outside of California, unless maybe internationally. But this is very difficult."

    In the San Francisco Bay Area, temperatures tied or broke all-time highs in a half-dozen cities. In Los Angeles, temperatures were in the 90s on Tuesday, prompting the nation's second-largest school district to limit the use of asphalt and concrete playgrounds.

    In neighboring Nevada, Reno's 106 F (41 C) on Tuesday was its hottest day ever recorded in September and smashed the previous record for the date, 96 F (35.5 C) in 1944. It came within 2 degrees of the all-time high for any day or month of 108 F (42 C), set in July 2002 and equaled in July 2007, according to the National Weather Service.

    Debbie Chang, left, and Kim Burrell, right, load bottled water into a cart to be distributed to people on the street in Sacramento, Calif., Tuesday, Sept. 6, 2022. The pair passed out water and snacks to those they find in need on the streets. Temperatures in the Sacramento area are forecasted to reach record highs Tuesday. Credit:AP Photo/Rich Pedroncelli

    In Utah's Salt Lake City—a city at more than 4,000 feet (1,219 meters) elevation—temperatures were about 20 degrees higher than normal, hitting 105 F (40.5 C) on Tuesday, the hottest September day recorded going back to 1874.

    Scientists say climate change has made the West warmer and drier over the last three decades and will continue to make weather more extreme and wildfires more frequent and destructive. In the last five years, California has experienced the largest and most destructive fires in state history.

    A wildfire that started Friday in the Northern California community of Weed killed two people and one that erupted Monday and spread rapidly in the Hemet area of Southern California also killed two people. Authorities said they were found in the same area and apparently died while trying to flee the flames.

    Pulling a cart filled with bottled water and snacks Kim Burrell, left, and Debbie Chang, right, walk the streets of Sacramento, Calif., Tuesday, Sept. 6, 2022. The pair have taken it upon themselves to pass out water and snacks to those they find in need on the streets. Temperatures in the Sacramento area are expected to reach record highs Tuesday. Credit:AP Photo/Rich Pedroncelli

    Though the heat wave was likely to peak in most places on Tuesday, extremely high temperatures are expected to continue for several more days.

    "It is a genuinely dangerous event from a human health perspective," said Daniel Swain, a climate scientist with the University of California, Los Angeles Institute for Environment and Sustainability

    Sacramento County officials were using the air-conditioned lobbies of some of their public buildings as cooling centers for people with nowhere else to go and offering free transportation for people who could not get there. Officials even handed out motel vouchers to some homeless people through a program they normally reserve for the winter, according to county spokeswoman Janna Haynes.

    "While a lot of people can stay home, a lot of people do not have a home to stay in," Haynes said.

    • A man creates giant soap suds bubbles at dawn Monday, Sept. 5, on the Manhattan Beach Pier in Manhattan Beach, Calif., as a severe heat wave gripped the state. Most of California's 39 million people are facing sweltering weather. Credit:AP Photo/John Antczak

    • The suns peaks over the California Public Employees Retirement System's building in Sacramento, Calif., Tuesday, Sept. 6, 2022. Due to the recent heat wave CalPERS employees were sent home to conserve energy. Credit:AP Photo/Rich Pedroncelli

    • Olof Wood walks across reef-like structures called microbialites, exposed by receding waters at the Great Salt Lake Tuesday, Sept. 6, 2022, near Salt Lake City. A blistering heat wave is breaking records in Utah, where temperatures hit 105 degrees Fahrenheit (40.5 degrees Celsius) on Tuesday, making it the hottest September day recorded going back to 1874. Credit:AP Photo/Rick Bowmer

    • Olof Wood walks across reef-like structures called microbialites, exposed by receding waters at the Great Salt Lake Tuesday, Sept. 6, 2022, near Salt Lake City. A blistering heat wave is breaking records in Utah, where temperatures hit 105 degrees Fahrenheit (40.5 degrees Celsius) on Tuesday. That is the hottest September day recorded going back to 1874. Credit:AP Photo/Rick Bowmer

    • Great Salt Lake visitor Olof Wood floats on the water at the Great Salt Lake Tuesday, Sept. 6, 2022, near Salt Lake City. A blistering heat wave is breaking records in Utah, where temperatures hit 105 degrees Fahrenheit (40.5 degrees Celsius) on Tuesday. That is the hottest September day recorded going back to 1874. Credit:AP Photo/Rick Bowmer

    • A couple walks along the receding edge of the water after record low water levels are seen at the Great Salt Lake Tuesday, Sept. 6, 2022, near Salt Lake City. A blistering heat wave is breaking records in Utah, where temperatures hit 105 degrees Fahrenheit (40.5 degrees Celsius) on Tuesday. That is the hottest September day recorded going back to 1874. Credit:AP Photo/Rick Bowmer

    • Olof Wood walks across reef-like structures called microbialites, exposed by receding waters at the Great Salt Lake Tuesday, Sept. 6, 2022, near Salt Lake City. A blistering heat wave is breaking records in Utah, where temperatures hit 105 degrees Fahrenheit (40.5 degrees Celsius) on Tuesday. That is the hottest September day recorded going back to 1874. Credit:AP Photo/Rick Bowmer

    • Great Salt Lake visitors Benny and Faith Martens float on the water at the Great Salt Lake Tuesday, Sept. 6, 2022, near Salt Lake City. A blistering heat wave is breaking records in Utah, where temperatures hit 105 degrees Fahrenheit (40.5 degrees Celsius) on Tuesday, making it the hottest September day recorded going back to 1874. Credit:AP Photo/Rick Bowmer

    • A couple walks along the receding edge of the water after record low water levels are seen at the Great Salt Lake Tuesday, Sept. 6, 2022, near Salt Lake City. A blistering heat wave is breaking records in Utah, where temperatures hit 105 degrees Fahrenheit (40.5 degrees Celsius) on Tuesday, making it the hottest September day recorded going back to 1874. Credit:AP Photo/Rick Bowmer

    • Great Salt Lake visitor Olof Wood floats on the water at the Great Salt Lake Tuesday, Sept. 6, 2022, near Salt Lake City. A blistering heat wave is breaking records in Utah, where temperatures hit 105 degrees Fahrenheit (40.5 degrees Celsius) on Tuesday, making it the hottest September day recorded going back to 1874. Credit:AP Photo/Rick Bowmer

    In state office buildings, thermostats were being set at 85 degrees (29 C) at 5 p.m. to conserve electricity.

    Sacramento native Ariana Clark said she couldn't remember it ever being this hot for this long before. She said she turned her air conditioner off in the afternoons to conserve energy and kept her 9-month old son, Benito, cool by filling up a bucket for him to play in outside.

    "As long as he's keeping cool that's all that matters," Clark said.

    Juliana Hinch, who moved to Sacramento from San Diego 2 1/2 years ago said she has never seen heat like this before. She said some wetlands by her house have mostly dried up, so she leaves water in her front yard "for other random animals," including cats, squirrels and coyotes.

    Hinch said she once lived in Washington state but moved away because it was too cold. Now, she said "that sounds like a good problem to have." + Utforska vidare

    Chance of California power outages up as heat wave worsens

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