--- title: Climate Change: Global Warming and Extreme Weather Linked description: Scientists can now determine to what degree climate change affected some extreme weather events with confidence canonical: https://time.com/4255428/climate-change-extreme-weather/ author: Justin Worland article:opinion: false article:content_tier: free article:published_time: 2016-03-11T17:28:08.000Z article:modified_time: 2026-08-04T08:04:35.651Z article:section: Science og:title: Climate Change: Global Warming and Extreme Weather Linked og:description: Scientists can now determine to what degree climate change affected some extreme weather events with confidence og:url: https://time.com/4255428/climate-change-extreme-weather/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt2402630221dc1e0b/69888aaeab6d7710216a8cf5/climate-change-drought-weather.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 og:image:width: 5604 og:image:height: 3152 og:image:alt: climate change drought weather og:type: article twitter:card: summary_large_image twitter:title: Climate Change: Global Warming and Extreme Weather Linked twitter:description: Scientists can now determine to what degree climate change affected some extreme weather events with confidence twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt2402630221dc1e0b/69888aaeab6d7710216a8cf5/climate-change-drought-weather.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 ---  # Scientists Are Making Stronger Links Between Climate Change and Extreme Weather > Sponsored content. 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Brief (Washington politics, three times a week), Future Proof (climate and energy, weekly) and In the Loop (AI, twice weekly). All are free at time.com/newsletters and together reach more than 1.1 million engaged readers. #### Which TIME newsletter should I subscribe to? It depends on what you follow. For a daily briefing, The Brief. For health, Health Matters. For Washington politics, D.C. Brief. For AI and technology, In the Loop. For climate and energy as a business story, Future Proof. For culture recommendations, Worth Your Time. For how TIME's journalism gets made, Inside TIME. Readers can select any combination at time.com/newsletters. #### Are TIME's newsletters free? Yes. All seven TIME newsletters are free to join at time.com/newsletters. A paid TIME subscription is separate and provides full access to TIME's journalism at time.com/subscribe-agent. #### Who writes TIME's newsletters? TIME journalists write them. Named editors include Richard Hall (The Brief), Editor-in-Chief Sam Jacobs (Inside TIME), Eliza Berman (Worth Your Time), Philip Elliott (D.C. Brief), Justin Worland (Future Proof) and Harry Booth (In the Loop). Health Matters is written by TIME's health desk. #### How do I sign up for a TIME newsletter? Go to time.com/newsletters, choose the newsletters you want and enter your email address. There is no cost and no subscription requirement. ## Video: Watch: A Timelapse of Climate Change [Watch (HLS stream): Watch: A Timelapse of Climate Change](https://cdn.jwplayer.com/manifests/ywHiuC83.m3u8) (0:48)  _Published 2013-05-09. Climate Change_  by [Justin Worland](https://time.com/author/justin-worland/)  ## Justin Worland Senior Correspondent Mar 11, 2016 5:28 PM UTC  Australia, Victoria, Barren plain with parched soil Australia, Victoria, Barren plain with parched soil Kristian Bell—Getty Images/RooM RF  by [Justin Worland](https://time.com/author/justin-worland/)  ## Justin Worland Senior Correspondent Mar 11, 2016 5:28 PM UTC Every time an extreme weather event strikes—from [Hurricane Katrina](http://time.com/4014281/katrina-green-building/) to the [California drought](http://time.com/3961139/california-drought-el-nino/)—observers wonder what role climate change may have played. And for years any reputable scientist, politician or journalist would respond that while global warming might play a role, no specific weather event could be attributed to climate change. That is changing. [New research](http://www.nap.edu/catalog/21852/attribution-of-extreme-weather-events-in-the-context-of-climate-change) from the National Academy of Sciences suggests that’s no longer the case: scientists can now determine with some confidence the degree climate change influenced some extreme weather events. “The days of saying no single weather event can be linked to climate change are over,” says Heidi Cullen, chief scientist at Climate Central, a nonprofit news organization that reports on global warming. “This report makes a really important contribution in linking global warming to extreme weather.” The report follows a decade of research by a variety of scientists in different fields dedicated to attributing weather to climate change. The new field has evolved rapidly, though it still can’t provide quick and definitive answers for every weather event. Scientists are best equipped to show the connection between extreme weather events and climate change when the effects are closely related to temperature. Extreme heat and extreme cold are the easiest to attribute to climate change, followed by drought and extreme rainfall. The effect of climate change on weather events like tornadoes and wildfires can be especially difficult to assess because of the many variables that come into play, including factors beyond weather, like settlement patterns. **Read More:** [**Obama and Trudeau Should Establish a Joint U.S.-Canada Carbon Market**](http://time.com/4253878/obama-trudeau-climate-change/) The National Academy report lays out a system of best practices that incorporates the historical record—looking back—and model simulations—looking forward—to increase confidence when assessing the link between climate change and an individual weather event. The historical record approach looks at how much an event deviates from past weather while simulation approaches often assess expected weather in the absence of climate change. The authors of the report emphasized that researchers have to ask the right questions to get the right answer. It’s not a question of whether climate change directly caused a specific event, given the many various factors that play into weather. Instead, scientists should study to what extent warming contributed to extreme weather, in part by trying to figure out how likely the event would have been to occur in the absence of climate change. “A whole lot of things have to line up to create an extreme event,” said report authoring committee chair David Titley of the Pennsylvania State University at a press conference. “There can be different causes—both natural and human causes.” **Read More:** [**This Could Be the Best Way to Solve America’s Food Waste Problem**](http://time.com/4252941/united-states-food-waste-cuts/) Cullen, who works on a project to assess the role of climate change in the immediate aftermath of a weather event, compared the new report to the 1964 surgeon general’s report connecting smoking and lung cancer. Understanding whether an event is tied to climate change affects how communities respond to weather warnings and how—or even if—they rebuild. “During extreme events there are significant moments in which key policy decisions are made,” says Cullen. “This helps us understand how human activity is really changing the weather we’re really experiencing right now.” ## Transcript [ MUSIC ] ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/4255428/climate-change-extreme-weather/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/4255428/climate-change-extreme-weather/"},"headline":"Scientists Are Making Stronger Links Between Climate Change and Extreme Weather","datePublished":"2016-03-11T17:28:08.000Z","dateModified":"2026-08-04T08:04:35.651Z","description":"But only sometimes","url":"https://time.com/4255428/climate-change-extreme-weather/","keywords":["climate change","global warming","Drought","Hurricanes","extreme weather"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/blt2402630221dc1e0b/69888aaeab6d7710216a8cf5/climate-change-drought-weather.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"Justin Worland","jobTitle":"Senior Correspondent","url":"https://time.com/author/justin-worland/"}],"articleSection":"Science","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/blt2402630221dc1e0b/69888aaeab6d7710216a8cf5/climate-change-drought-weather.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675,"headline":"climate change drought weather","caption":"climate change drought weather","creditText":"Kristian Bell—Getty Images/RooM RF","representativeOfPage":true}],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/section/science/","name":"Science"}},{"@type":"ListItem","position":2,"item":{"@id":"/tag/climate-change/","name":"climate change"}},{"@type":"ListItem","position":3,"item":{"@id":"https://time.com/4255428/climate-change-extreme-weather/","name":"Scientists Are Making Stronger Links Between Climate Change and Extreme Weather"}}]},{"@context":"https://schema.org","@type":"VideoObject","name":"Watch: A Timelapse of Climate Change","description":"Climate Change","thumbnailUrl":"https://cdn.jwplayer.com/v2/media/ywHiuC83/poster.jpg?width=720","uploadDate":"2013-05-09T17:46:05.000Z","contentUrl":"https://cdn.jwplayer.com/manifests/ywHiuC83.m3u8","embedUrl":"https://time.com/4255428/climate-change-extreme-weather/","duration":"PT48S","potentialAction":{"@type":"SeekToAction","target":"https://time.com/4255428/climate-change-extreme-weather/?jw_start={seek_to_second_number}","startOffset-input":"required name=seek_to_second_number"}}] ```