{"id":549345,"date":"2026-03-20T16:36:08","date_gmt":"2026-03-20T16:36:08","guid":{"rendered":"https:\/\/www.newsbeep.com\/ca\/549345\/"},"modified":"2026-03-20T16:36:08","modified_gmt":"2026-03-20T16:36:08","slug":"heatwave-scorching-us-west-virtually-impossible-without-climate-crisis-say-scientists-us-weather","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/ca\/549345\/","title":{"rendered":"Heatwave scorching US west \u2018virtually impossible\u2019 without climate crisis, say scientists | US weather"},"content":{"rendered":"

The record-breaking heatwave<\/a> scorching the US west this week would have been \u201cvirtually impossible\u201d if not for the climate crisis, a team of scientists has determined.<\/p>\n

Millions of Americans from the Pacific coast to the Rockies baked under unseasonably warm and even dangerous temperatures this week, with temperatures up to 30F (17C) above average for the time of year.<\/p>\n

The climate crisis, caused primarily by the burning of fossil fuels, has made this kind of heatwave four times more likely to occur over the last decade, according to a new rapid analysis released Friday<\/a>.<\/p>\n

\u201cThese temperatures are completely off the scale for March,\u201d said analysis co-author Ben Clarke, who is an extreme weather and climate change researcher at Imperial College London, in a statement.<\/p>\n

Even as recently as 2016, the current heatwave would have also been milder, with temperatures about 1.4F (0.8C) cooler, says the analysis by World Weather Attribution, an international consortium of climate researchers.<\/p>\n

\u201cThese findings leave no room for doubt. Climate change is pushing weather into extremes that would have been unthinkable in a preindustrial world,\u201d said Friederike Otto, a climate science professor at Imperial College London, who also worked on the study.<\/p>\n

To carry out their rapid analysis, the scientists examined forecasts for a five-day period, from 18-22 March. To quantify the impact of global warming on the week\u2019s extreme temperatures, the researchers analyzed weather and forecast data, and also used climate model simulations to compare how heat events have changed in today\u2019s climate.<\/p>\n

Fueled by an area of high pressure in the atmosphere, the heat dome has shattered temperature records in 140 cities stretching from California to Missouri, according to the Weather Channel<\/a>, while leaving California, Nevada and Arizona under extreme heat warnings on Thursday.<\/p>\n

More heat is in store for the coming days. The mercury is expected to continue ticking upward in the south-west, and the heatwave is expected to creep toward the plains and the south later this week. By the end of the week, 100 cities could set all-time temperature records for the month of March, with temperatures climbing as high as 30F (17C) above average for the time of year, the new analysis says.<\/p>\n

Heat is the deadliest form of extreme weather in the US. Weather officials this week raised concerns about an increase in heat-related illnesses, especially among vulnerable populations, and advised people to remain hydrated and stay inside when they can.<\/p>\n

The heat has also taken a toll on local economies, with multiple California and Tahoe-area ski resorts being forced to close or shrink operations<\/a> amid rapid snowmelt and high temperatures this week.<\/p>\n

\u201cIn the US west, the seasons that people and nature were used to for centuries are disappearing, putting many, including outdoor workers and those without air conditioning, in danger,\u201d said Otto. \u201cThe threat isn\u2019t distant \u2013 it is here, it is worsening and our policy must catch up with reality.\u201d<\/p>\n

This article was amended on 20 March 2026 to make clear that the heatwave temperatures would have been about 1.4F (0.8C) cooler in 2016, rather than in preindustrial times. For that, the correct figure would have been about 4.7F (2.6C) cooler.<\/p>\n","protected":false},"excerpt":{"rendered":"The record-breaking heatwave scorching the US west this week would have been \u201cvirtually impossible\u201d if not for the…\n","protected":false},"author":2,"featured_media":549346,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[49,48,295,66],"class_list":{"0":"post-549345","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-environment","8":"tag-ca","9":"tag-canada","10":"tag-environment","11":"tag-science"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts\/549345","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/comments?post=549345"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts\/549345\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/media\/549346"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/media?parent=549345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/categories?post=549345"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/tags?post=549345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}