--- title: Climate Change Tied to Louisiana Flooding, Report Says description: Climate change increased the chance of last month's historic flooding in Louisiana as rain intensity has grown, according to an analysis canonical: https://time.com/4482109/climate-change-louisiana-flooding/ author: Justin Worland article:opinion: false article:content_tier: free article:published_time: 2016-09-07T17:53:13.000Z article:modified_time: 2026-02-23T00:26:41.209Z article:section: Science og:title: Climate Change Tied to Louisiana Flooding, Report Says og:description: Climate change increased the chance of last month's historic flooding in Louisiana as rain intensity has grown, according to an analysis og:url: https://time.com/4482109/climate-change-louisiana-flooding/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt3c36ff4af48f3f34/6988a519a988ca8ffc6b9559/louisiana-flooding-baton-rouge.jpeg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 og:image:width: 3000 og:image:height: 1688 og:image:alt: louisiana flooding baton rouge og:type: article twitter:card: summary_large_image twitter:title: Climate Change Tied to Louisiana Flooding, Report Says twitter:description: Climate change increased the chance of last month's historic flooding in Louisiana as rain intensity has grown, according to an analysis twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt3c36ff4af48f3f34/6988a519a988ca8ffc6b9559/louisiana-flooding-baton-rouge.jpeg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 ---  # How Climate Change Helped Cause Massive Floods in Louisiana > Sponsored content. 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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.  by [Justin Worland](https://time.com/author/justin-worland/)  ## Justin Worland Senior Correspondent Sep 7, 2016 5:53 PM UTC  Richard Schafer navigates a boat past a flooded home on Aug. 15, 2016 in Baton Rouge, Louisiana. Richard Schafer navigates a boat past a flooded home on Aug. 15, 2016 in Baton Rouge, Louisiana.Joe Raedle—Getty Images  by [Justin Worland](https://time.com/author/justin-worland/)  ## Justin Worland Senior Correspondent Sep 7, 2016 5:53 PM UTC Climate change significantly increased the chance of last month’s [historic flooding in Louisiana](http://time.com/4464474/louisiana-governor-flooding-president-obama-alton-sterling/), part of a pattern of intense rain event that have grown increasingly common since human influence [began shaping the climate](http://time.com/4461719/global-warming-climate-change-humans/) more than a century ago, according to a [rapid analysis](https://wwa.climatecentral.org/analyses/louisiana-downpours-august-2016/) of the weather event. Scientists from the National Oceanic and Atmospheric Administration (NOAA) and the World Weather Attribution (WWA) group modeled the likelihood of Louisiana’s record rainfall and evaluated how those odds have changed over the past century, as humans themselves have altered the climate. Climate change increased the likelihood of the event by at least 40% and might have even doubled the chances of it occurring, according to the study. Climate change increases the intensity of precipitation because warm weather leads more water to evaporate forming wetter clouds. South Louisiana received nearly 30 inches of rain between August 10 and 17\. 13 people died in the floods, which inundated Baton Rouge and destroyed 60,000 homes. The storm began with the development of a low-pressure system in the Gulf of Mexico, and unusual warmth in the region helped cause more water to evaporate, further feeding the storm clouds. **Read More**: [New Orleans Tells the Story of Resilience After Disaster](http://time.com/4015089/new-orleans-resilience-after-disaster/) NOAA and WMA described the storm as a 1-in-550 year event in that particular spot given the current climate. That means that a storm of that magnitude should only be expected to occur once every 550 years in that particular part of Louisiana. The storm should be considered a 1-in-30 year even across the entire Gulf Coast, researchers said. But without drastic efforts to slow global warming, such storms are expected to become even more common in the future. Imagine weather as the result of a toss of the dice, and for an extreme rainfall event to happen, you need to throw a 12\. That’s unlikely—you have a 3% chance of throwing 12 on any given toss of the dice, just as a storm that brings more than 30 inches of rain is extremely unusual. What climate change is doing is [loading the dice](http://www.scientificamerican.com/article/climate-change-increases-extreme-weather-events/), as many scientists have pointed out, which makes that roll of a 12—or the extreme weather event—that much more likely. Attributing any [one event](http://time.com/4365004/paris-floods-climate-change/) to climate change has always been difficult, but scientists have developed methods to quickly assess the links between climate change and extreme weather events in recent year. A National Academies of Sciences [report from earlier this year](http://time.com/4255428/climate-change-extreme-weather/) determined that climate science has advanced far enough that researchers can now accurately determine how global warming affects extreme temperature events, as well as drought and extreme rainfall. **Read More:** [Why ‘Once-In-A-Lifetime’ Flooding Keeps Happening](http://time.com/4061371/south-carolina-flooding-climate-change/) The WWA, a partnership between global warming non-profit Climate Central and other research institutions, conducts quick analysis in the aftermath of weather events. ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/4482109/climate-change-louisiana-flooding/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/4482109/climate-change-louisiana-flooding/"},"headline":"How Climate Change Helped Cause Massive Floods in Louisiana","datePublished":"2016-09-07T17:53:13.000Z","dateModified":"2026-02-23T00:26:41.209Z","description":"South Louisiana received nearly 30 inches of rain between August 10 and 17","url":"https://time.com/4482109/climate-change-louisiana-flooding/","keywords":["climate change","weather"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/blt3c36ff4af48f3f34/6988a519a988ca8ffc6b9559/louisiana-flooding-baton-rouge.jpeg?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/blt3c36ff4af48f3f34/6988a519a988ca8ffc6b9559/louisiana-flooding-baton-rouge.jpeg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675,"headline":"louisiana flooding baton rouge","caption":"louisiana flooding baton rouge","creditText":"Joe Raedle—Getty Images","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/4482109/climate-change-louisiana-flooding/","name":"How Climate Change Helped Cause Massive Floods in Louisiana"}}]}] ```