<!DOCTYPE html>
<html lang="en" class="article-page"  data-template="default" data-version="1.2.17" data-timestamp="2018-01-22T17:22:43+00:00">
<head>
	    		<!-- Global Site Tag (gtag.js) - Google Analytics -->
		<script async src="https://www.googletagmanager.com/gtag/js?id=UA-34959260-1"></script>
		<script>
			window.dataLayer = window.dataLayer || [];
			function gtag(){dataLayer.push(arguments);}
			gtag('js', new Date());
			gtag('config', 'UA-34959260-1');
		</script>

		<script>
								dataLayer = [];
			
	dataLayer.push({
		'author': 'Robin Andrews'
	});
	dataLayer.push({
		'category': 'Environment'
	});
		</script>

		<!-- Google Tag Manager -->
		<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
				new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
				j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
				'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
			})(window,document,'script','dataLayer', 'GTM-N63TNMR');</script>
		<!-- End Google Tag Manager -->
    
	<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1" />

	<meta name="theme-color" content="#BBDF33 ">

	<title>&quot;Unprecedented&quot; Hurricane Harvey Is &quot;One Of The Worst Disasters In US History&quot; | IFLScience</title>
	<meta name="description" content="Hurricane Harvey is set to be one of the worst natural disasters in US history. Here's a recap of recent events, and what it means for a hurricane to be “u" />

	<meta name="news_keywords" content="flooding">

	<meta property="og:title" content="'Unprecedented' Hurricane Harvey Is 'One Of The Worst Disasters In US History'" />
	<meta property="og:type" content="article"/>
	<meta property="og:url" content="http://www.iflscience.com/environment/unprecedented-hurricane-harvey-worst-disasters-us-history/" />
	<meta property="og:site_name" content="IFLScience" />
	<meta property="og:description" content="Harvey may have been downgraded to a storm from a Category 4 hurricane, but it will sit over Texas until the middle of the week – and its legacy will be fe" />
	<meta property="og:image" content="http://cdn.iflscience.com/images/8511613c-bb53-592d-a48b-81e8fc4bd8cb/default-1503917131-cover-image.jpg" />

	<meta name="twitter:card" content="summary" />
	<meta name="twitter:site" content="@IFLScience" />
	<meta name="twitter:title" content="'Unprecedented' Hurricane Harvey Is 'One Of The Worst Disasters In US History'" />
	<meta name="twitter:description" content="Harvey may have been downgraded to a storm from a Category 4 hurricane, but it will sit over Texas until the middle of the week – and its legacy will be fe" />
	<meta name="twitter:image" content="http://cdn.iflscience.com/images/8511613c-bb53-592d-a48b-81e8fc4bd8cb/default-1503917131-cover-image.jpg" />

	<meta name="standout" content="" />

	<meta property="fb:pages" content="367116489976035" />

		<meta property="fb:app_id" content="1634389153445458" />
            <meta property="ia:markup_url" content="http://www.iflscience.com/environment/unprecedented-hurricane-harvey-worst-disasters-us-history/fbia.html" />
    			<meta name="apple-mobile-web-app-status-bar-style" content="black">
		<meta name="apple-mobile-web-app-capable" content="yes">
		<meta name="mobile-web-app-capable" content="yes">
		<link rel="canonical" href="http://www.iflscience.com/environment/unprecedented-hurricane-harvey-worst-disasters-us-history/" />
	<link rel="publisher" href="https://plus.google.com/+Iflscienceofficial" />
	<link rel="icon" type="image/x-icon" href="http://cdn.iflscience.com/favicon.ico?v=1.2.17"/>
		<link href="http://fonts.googleapis.com/css?family=Open+Sans:400italic,400,700" rel="stylesheet" type="text/css">
	<link rel="stylesheet" href="http://cdn.iflscience.com/assets/site/build/style.1.2.17.css?v=1.2.17">
			<script type="text/javascript" async="async" src="https://widgets.outbrain.com/outbrain.js"></script>
	</head>
<body class="admin sidebar-hidden" >
    		<!-- Google Tag Manager (noscript) -->
		<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-N63TNMR"
						  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
		<!-- End Google Tag Manager (noscript) -->
    	<div id="fb-root"></div>
	<script>
      window.fbAsyncInit = function() {
        FB.init({
          appId      : '1634389153445458',
          xfbml      : true,
          version    : 'v2.5'
        });
      };
      (function(d, s, id){
        var js, fjs = d.getElementsByTagName(s)[0];
        if (d.getElementById(id)) {return;}
        js = d.createElement(s); js.id = id;
        js.src = "//connect.facebook.net/en_US/sdk.js";
        fjs.parentNode.insertBefore(js, fjs);
      }(document, 'script', 'facebook-jssdk'));
	</script>
            <div class="totop"><i class="ion-android-arrow-up"></i></div>
<div class="topad">
	<div id="CONTAINER_TOP_AD"></div>
</div>
<header class="header">
	<div class="inner">
		<a class="logo" href="http://www.iflscience.com/">
			<img src="http://cdn.iflscience.com/assets/site/img/iflscience_logo.png?v=1.2.17" alt="IFLScience logo" class="main-logo">
			<img src="http://cdn.iflscience.com/assets/site/img/iflscience_logo_narrow.png?v=1.2.17" alt="IFLScience logo" class="alt-logo">
		</a>
		<div class="shownav">
			<span></span>
			<span></span>
			<span></span>
		</div>
		<ul class="social">
			<li class="store"><a href="https://goo.gl/Ww7iWa" target="_blank" title="Visit the I Love Science Store"><img src="http://cdn.iflscience.com/assets/site/img/ilss-logo.png?v=1.2.17" alt="I Love Science Store"></a></li>
			<li class="facebook"><a href="https://www.facebook.com/IFeakingLoveScience" target="_blank" title="IFLScience on Facebook"><i class="ion-social-facebook"></i></a></li>
			<li class="twitter"><a href="https://twitter.com/IFLScience" target="_blank" title="IFLScience on Twitter"><i class="ion-social-twitter"></i></a></li>
			<li class="googleplus"><a href="https://plus.google.com/+Iflscienceofficial" target="_blank" title="IFLScience on Google+"><i class="ion-social-googleplus"></i></a></li>
			<li class="extranav"><a href="#"><i class="ion-plus"></i></a></li>
		</ul>
	</div>
	<nav class="nav">
			<ul>
									<li>
						<a href="http://www.iflscience.com/environment/">
							<img onerror="this.onerror=null;this.src = 'http://cdn.iflscience.com/assets/site/img/iflscience_logo.png?v=1.2.17';" src="http://cdn.iflscience.com/assets/site/img/icon-environment.png?v=1.2.17" alt="Environment">
							<span><b>Environment</b></span>
						</a>
					</li>
									<li>
						<a href="http://www.iflscience.com/technology/">
							<img onerror="this.onerror=null;this.src = 'http://cdn.iflscience.com/assets/site/img/iflscience_logo.png?v=1.2.17';" src="http://cdn.iflscience.com/assets/site/img/icon-technology.png?v=1.2.17" alt="Technology">
							<span><b>Technology</b></span>
						</a>
					</li>
									<li>
						<a href="http://www.iflscience.com/space/">
							<img onerror="this.onerror=null;this.src = 'http://cdn.iflscience.com/assets/site/img/iflscience_logo.png?v=1.2.17';" src="http://cdn.iflscience.com/assets/site/img/icon-space.png?v=1.2.17" alt="Space">
							<span><b>Space</b></span>
						</a>
					</li>
									<li>
						<a href="http://www.iflscience.com/health-and-medicine/">
							<img onerror="this.onerror=null;this.src = 'http://cdn.iflscience.com/assets/site/img/iflscience_logo.png?v=1.2.17';" src="http://cdn.iflscience.com/assets/site/img/icon-health-and-medicine.png?v=1.2.17" alt="Health and Medicine">
							<span><b>Health and Medicine</b></span>
						</a>
					</li>
									<li>
						<a href="http://www.iflscience.com/brain/">
							<img onerror="this.onerror=null;this.src = 'http://cdn.iflscience.com/assets/site/img/iflscience_logo.png?v=1.2.17';" src="http://cdn.iflscience.com/assets/site/img/icon-the-brain.png?v=1.2.17" alt="The Brain">
							<span><b>The Brain</b></span>
						</a>
					</li>
									<li>
						<a href="http://www.iflscience.com/plants-and-animals/">
							<img onerror="this.onerror=null;this.src = 'http://cdn.iflscience.com/assets/site/img/iflscience_logo.png?v=1.2.17';" src="http://cdn.iflscience.com/assets/site/img/icon-plants-and-animals.png?v=1.2.17" alt="Plants and Animals">
							<span><b>Plants and Animals</b></span>
						</a>
					</li>
									<li>
						<a href="http://www.iflscience.com/physics/">
							<img onerror="this.onerror=null;this.src = 'http://cdn.iflscience.com/assets/site/img/iflscience_logo.png?v=1.2.17';" src="http://cdn.iflscience.com/assets/site/img/icon-physics.png?v=1.2.17" alt="Physics">
							<span><b>Physics</b></span>
						</a>
					</li>
									<li>
						<a href="http://www.iflscience.com/chemistry/">
							<img onerror="this.onerror=null;this.src = 'http://cdn.iflscience.com/assets/site/img/iflscience_logo.png?v=1.2.17';" src="http://cdn.iflscience.com/assets/site/img/icon-chemistry.png?v=1.2.17" alt="Chemistry">
							<span><b>Chemistry</b></span>
						</a>
					</li>
									<li>
						<a href="http://www.iflscience.com/policy/">
							<img onerror="this.onerror=null;this.src = 'http://cdn.iflscience.com/assets/site/img/iflscience_logo.png?v=1.2.17';" src="http://cdn.iflscience.com/assets/site/img/icon-policy.png?v=1.2.17" alt="Policy">
							<span><b>Policy</b></span>
						</a>
					</li>
									<li>
						<a href="http://www.iflscience.com/editors-blog/">
							<img onerror="this.onerror=null;this.src = 'http://cdn.iflscience.com/assets/site/img/iflscience_logo.png?v=1.2.17';" src="http://cdn.iflscience.com/assets/site/img/icon-editors-blog.png?v=1.2.17" alt="Editor's Blog">
							<span><b>Editor&#039;s Blog</b></span>
						</a>
					</li>
							</ul>
		</nav>
</header>
        		<div class="page">
            <div id="CONTAINER_BELOW_HEADER"></div>
			<section class="main-content">
				<section class="single-post">
                    <div class="stories-above"></div>
                    <div id="CONTAINER_ABOVE_ARTICLE"></div>

                    
					<article class="post environment single">
						<div class="inner">
							<div class="top">
								<div class="lead">
									<h1 class="title">"Unprecedented" Hurricane Harvey Is "One Of The Worst Disasters In US History"</h1>
									<div class="social-shares">
										<div class="share-count" id="share-count">
                                            23022
										</div>
                                        <div class="share-widget share-article">
	<div class="sw">
		<a class="facebook" href="#" onclick="window.open('https://www.facebook.com/sharer/sharer.php?u='+encodeURIComponent('http://www.iflscience.com/environment/unprecedented-hurricane-harvey-worst-disasters-us-history/'),'facebook-share-dialog','width=626,height=436');return false;">
			<i class="ion-social-facebook"></i>
			<span>Share<b> on Facebook</b></span>
		</a>
	</div>
	<div class="sw">
		<a href="#" class="twitter" onclick="window.open('https://twitter.com/intent/tweet?text=\&#039;Unprecedented\&#039; Hurricane Harvey Is \&#039;One Of The Worst Disasters In US History\&#039; via @IFLScience:&url='+encodeURIComponent('http://www.iflscience.com/environment/unprecedented-hurricane-harvey-worst-disasters-us-history/'),'twitter-share-dialog','width=626,height=436');return false;">
			<i class="ion-social-twitter"></i>
			<span>Share<b> on Twitter</b></span>
		</a>
	</div>
	<div class="sw">
		<a href="#" class="google" onclick="window.open('https://plus.google.com/share?url='+encodeURIComponent('http://www.iflscience.com/environment/unprecedented-hurricane-harvey-worst-disasters-us-history/'),'facebook-share-dialog','width=626,height=436');return false;">
			<i class="ion-social-googleplus"></i>
		</a>
	</div>
	<div class="sw">
		<a href="#" onclick="window.open('https://www.reddit.com/submit?url='+encodeURIComponent('http://www.iflscience.com/environment/unprecedented-hurricane-harvey-worst-disasters-us-history/'),'facebook-share-dialog','width=626,height=436');return false;" class="reddit">
			<i class="ion-social-reddit"></i>
		</a>
	</div>
	<div class="sw">
		<a href="#" class="showmore">
			<i class="ion-plus"></i>
		</a>
	</div>
</div>									</div>
								</div>
								<div class="image-wrap ">
                                    										<a class="image-expand" href="#">
											<i class="ion-arrow-resize"></i>
										</a>
                                    									<a class="category" href="http://www.iflscience.com/environment/">Environment</a>
									<div class="images one">
                                                                                                                                    
													<picture>
														<!--[if IE 9]><video style="display: none"><![endif]-->
														<source data-srcset="http://cdn.iflscience.com/images/8511613c-bb53-592d-a48b-81e8fc4bd8cb/small-1503917131-cover-image.jpg" media="(max-width: 360px)" />
														<source data-srcset="http://cdn.iflscience.com/images/8511613c-bb53-592d-a48b-81e8fc4bd8cb/medium-1503917131-cover-image.jpg" media="(max-width: 540px)" />
														<source data-srcset="http://cdn.iflscience.com/images/8511613c-bb53-592d-a48b-81e8fc4bd8cb/large-1503917131-cover-image.jpg" media="(max-width: 680px)" />
														<source data-srcset="http://cdn.iflscience.com/images/8511613c-bb53-592d-a48b-81e8fc4bd8cb/default-1503917131-cover-image.jpg" media="(max-width: 768px)" />
														<source data-srcset="http://cdn.iflscience.com/images/8511613c-bb53-592d-a48b-81e8fc4bd8cb/large-1503917131-cover-image.jpg" media="(max-width: 1024px)" />
														<source data-srcset="http://cdn.iflscience.com/images/8511613c-bb53-592d-a48b-81e8fc4bd8cb/extra_large-1503917131-cover-image.jpg" />
														<!--[if IE 9]></video><![endif]-->
														<img src="http://cdn.iflscience.com/assets/site/img/ifls-placeholder.png?v=1.2.17" data-src="http://cdn.iflscience.com/assets/site/img/ifls-placeholder.png?v=1.2.17" class="lazyload" alt="'Unprecedented' Hurricane Harvey Is 'One Of The Worst Disasters In US History'" />
													</picture>

                                                                                                                                    									</div>
								</div>
							</div>
							<div class="content">
								<div class="image-credits">
                                                                            											<div class="image-credit"><p>Hurricane Harvey seen here on August 24, shortly before landfall. NASA</p></div>
                                                                            								</div>
								<div id="CONTAINER_ABOVE_ARTICLE_CONTENT"></div>
								<div class="author">
                                    										<a href="http://www.iflscience.com/team/robin-andrews/" class="image">
                                            												<img src="http://cdn.iflscience.com/images/677be514-ad8a-554e-be6e-7eb22b8697af/author_large-1465395159-robin-andrews.jpg" alt="Robin Andrews" onerror="this.onerror=null;this.src = 'http://cdn.iflscience.com/assets/site/img/noface.png?v=1.2.17'">
                                            										</a>
										<h5 class="name"><a href="http://www.iflscience.com/team/robin-andrews/">By Robin Andrews</a></h5>
										<span class="date"><a href="http://www.iflscience.com/team/robin-andrews/">28 Aug 2017, 15:21</a></span>
                                    								</div>
								<div class="article-content">
                                    <div id="CONTAINER_ARTICLE_CONTENT"></div>
                                    <p>Harvey may have been downgraded to a storm from a <a href="http://www.iflscience.com/environment/most-powerful-us-hurricane-over-decade-imminent-disaster-texas/all/">Category 4 hurricane</a>, but it will sit over Texas until the middle of the week – and its legacy will be felt for years to come. It’s being described by the National Weather Service (NWS) as an “unprecedented event”, whose “impacts are unknown and beyond anything experienced” – but what does this mean exactly?</p>
<p>First, a little recap. Hurricane Harvey was once mere remnants of a storm, but when it crossed the Gulf of Mexico it regenerated into an increasingly powerful hurricane. By 1930 hours CDT, shortly before landfall, it was upgraded to a Category 4 beast, with peak sustained wind speeds of 251 kph (156 mph).</p>
<p>The winds were never going to be the most threatening part of the hurricane though. By far, the rain, <a href="http://www.iflscience.com/environment/whats-the-most-powerful-natural-disaster-that-the-world-has-ever-experienced/all/">storm surge</a>, and combined flooding was going to be the greatest risk. At the time, the surge was expected to be 3.7 meters (12 feet) high, and forecasts suggested that parts of Texas would receive as much as 71 percent of its annual precipitation coverage in around two days.</p>
<p>Things have turned out much worse than this. Although it’s now been massively downgraded, the storm has stalled and continues to dump rain on Texas.</p>
<figure class="image"><img src="http://cdn.iflscience.com/images/537a9cea-8ef7-54eb-b4d6-73558c6b76c8/content-1503916507-nws.jpg" alt="" /><figcaption>And it's still not over. <a href="https://twitter.com/NWS/status/901832717070983169">NWS</a> via Twitter</figcaption></figure><p>It looks like a year’s worth of rain is going to fall on Houston during the course of this storm; already, entire suburbs are submerged, and two dams keeping much of the floodwater back are full. Despite efforts to drain these dams, they are expected to <a href="http://www.bbc.co.uk/news/world-us-canada-41070237">overflow</a> and trigger flash flooding along their margins.</p>
<p>The rivers nearby are swelling, and are expected to continue to exacerbate flooding overnight and throughout Monday. Although Houston has not been issued with a mass evacuation order, it’s not far from receiving one. At the same time, thousands of members of the National Guard have evacuated tens of thousands of people, but a few have died trapped by the <a href="https://twitter.com/ReaganMatt/status/901913118078640135">floods</a>.</p>
<div class="ifls-social-embed" data-ifls-social-embed="twitter" data-ifls-social-embed-code="PGJsb2NrcXVvdGUgY2xhc3M9InR3aXR0ZXItdHdlZXQiIGRhdGEtbGFuZz0iZW4iPjxwIGxhbmc9ImVuIiBkaXI9Imx0ciI+VGhpcyBjb3VsZCBlYXNpbHkgYmUgb25lIG9mIHRoZSB3b3JzdCBmbG9vZGluZyBkaXNhc3RlcnMgaW4gVS5TLiBIaXN0b3J5LiAgVGhlIGhlYXZ5IHJhaW4gd2lsbCBsYXN0IHRocnUgbXVjaCBvZiB0aGUgd2VlayAgICA8YSBocmVmPSJodHRwczovL3R3aXR0ZXIuY29tL2hhc2h0YWcvdHh3eD9zcmM9aGFzaCI+I3R4d3g8L2E+IDxhIGhyZWY9Imh0dHBzOi8vdHdpdHRlci5jb20vaGFzaHRhZy9IYXJ2ZXk/c3JjPWhhc2giPiNIYXJ2ZXk8L2E+IDxhIGhyZWY9Imh0dHBzOi8vdC5jby9rR1dDOExMOGFMIj5waWMudHdpdHRlci5jb20va0dXQzhMTDhhTDwvYT48L3A+Jm1kYXNoOyBHcmVnIFBvc3RlbCAoQEdyZWdQb3N0ZWwpIDxhIGhyZWY9Imh0dHBzOi8vdHdpdHRlci5jb20vR3JlZ1Bvc3RlbC9zdGF0dXMvOTAxNzQxMzcwMTU4ODUwMDUyIj5BdWd1c3QgMjcsIDIwMTc8L2E+PC9ibG9ja3F1b3RlPgo8c2NyaXB0IGFzeW5jIHNyYz0iLy9wbGF0Zm9ybS50d2l0dGVyLmNvbS93aWRnZXRzLmpzIiBjaGFyc2V0PSJ1dGYtOCI+PC9zY3JpcHQ+">-</div>
<p>“Ongoing catastrophic and life-threatening flooding will continue across southeastern Texas,” the NWS explains in a recent advisory <a href="https://twitter.com/NHC_Atlantic/status/901999258932576259">statement</a>. They add that “the flood threat is spreading farther east into Louisiana.”</p>

                                                                            											<div class="article-navigation">

                                                                                                
                                                													<a class="btn next mo" rel="next" href="http://www.iflscience.com/environment/unprecedented-hurricane-harvey-worst-disasters-us-history/page-2/">Next Page<i class="ion-ios-arrow-right"></i></a>
                                                
                                                
                                                													<a class="btn next do" rel="next" href="http://www.iflscience.com/environment/unprecedented-hurricane-harvey-worst-disasters-us-history/page-2/">Next Page<i class="ion-ios-arrow-right"></i></a>
                                                
                                                													<div class="full-article">
														<a href="http://www.iflscience.com/environment/unprecedented-hurricane-harvey-worst-disasters-us-history/all/">Full Article</a>
													</div>
                                                											</div>
                                                                            								</div>
								<div class="story-below">
                                    <div id="CONTAINER_BELOW_ARTICLE_CONTENT"></div>
								</div>
                                <div class="comments">
            <div class="show-comments">
            <span>Comments</span>
            <i class="ion-plus"></i>
        </div>
        <div class="comments-wrap">
            <div class="fb-comments" data-href="http://www.iflscience.com/environment/unprecedented-hurricane-harvey-worst-disasters-us-history/" data-numposts="5" data-order-by="reverse_time" width="100%"></div>
        </div>
    </div>
                                <div id="CONTAINER_BELOW_ARTICLE_COMMENTS"></div>
							</div>
						</div>
					</article>

                    
                    <div id="CONTAINER_BELOW_ARTICLE"></div>

				</section>
                <section class="more-science">
	<h2 class="section-title"><span><i class="ion-erlenmeyer-flask"></i>If you liked this story, you'll love these</span></h2>
	<div class="infinite-content" id="infinite-content">
	</div>
</section>
			</section>
            <aside class="sidebar">
	<div id="CONTAINER_SIDEBAR_1"></div>
	<div class="widget">
  <h3 class="widget-title"><i class="ion-eye"></i>Popular Stories</h3>
  <div class="widget-content">
    <ul class="post-list alt" id="popular-stories">
          </ul>
  </div>
</div>
	<div id="CONTAINER_SIDEBAR_2"></div>
	<div class="widget newsletter-widget">				
	<div class="widget-content">
		<h3 class="widget-title">Week in Science</h3>
		<h4 class="widget-subtitle">The IFLScience Newsletter</h4>
		<p>Sign up today to get weekly science coverage direct to your inbox</p>

		<div id="mc_embed_signup">
			<form action="//iflscience.us9.list-manage.com/subscribe/post?u=f5901557836e7dc3982d630fa&amp;id=41a330b0b9" method="post" id="mc-embedded-subscribe-form" name="mc-embedded-subscribe-form" class="validate" target="_blank" novalidate>
				<div id="mc_embed_signup_scroll">
					<div class="mc-field-group">
						<input type="email" value="" name="EMAIL" class="required email" id="mce-EMAIL">
						<input type="submit" value="Signup" name="subscribe" id="mc-embedded-subscribe" class="button">
					</div>
					<div id="mce-responses" class="clear">
						<div class="response" id="mce-error-response" style="display:none"></div>
						<div class="response" id="mce-success-response" style="display:none"></div>
					</div>
					<div style="position: absolute; left: -5000px;" aria-hidden="true">
						<input type="text" name="b_f5901557836e7dc3982d630fa_41a330b0b9" tabindex="-1" value="">
					</div>
				</div>
			</form>
		</div>

	</div>
</div>
	<div data-affix-sidebar>
		<div id="CONTAINER_SIDEBAR_STICKY"></div>
	</div>
</aside>
            <aside class="adbar">
	<div id="CONTAINER_ADBAR"></div>
    <div data-affix-sidebar>
        <div id="CONTAINER_ADBAR_STICKY"></div>
    </div>
</aside>
		</div>
    
            <div id="CONTAINER_ABOVE_FOOTER"></div>
<div class="footer">
    <div class="inner">
        <div class="footer-menu">
            <ul>
                <li>
                    <h4>Navigation</h4>
                </li>
                <li>
                    <a href="/">Home</a>
                </li>
                <li>
                    <a href="/team/">Team</a>
                </li>
                                    <li>
                        <a href="http://www.iflscience.com/careers/">Careers</a>
                    </li>
                                <li>
                    <a href="https://www.ilovesciencestore.com/">IFLScience Store</a>
                </li>
            </ul>
            <ul>
                <li>
                    <h4>Contact</h4>
                </li>
                                    <li>
                        <a href="http://www.iflscience.com/submit-news/">Submit News</a>
                    </li>
                                    <li>
                        <a href="http://www.iflscience.com/contact/">Contact</a>
                    </li>
                            </ul>
            <ul>
                <li>
                    <h4>Advertising</h4>
                </li>
                                    <li>
                        <a href="http://www.iflscience.com/advertise/">Advertise</a>
                    </li>
                            </ul>
            <ul>
                <li>
                    <h4>Legal</h4>
                </li>
                                    <li>
                        <a href="http://www.iflscience.com/terms-of-use/">Terms of Use</a>
                    </li>
                                    <li>
                        <a href="http://www.iflscience.com/privacy-policy/">Privacy Policy</a>
                    </li>
                            </ul>
        </div>
    </div>
</div>
    
    <script id="page-metadata" type="application/ld+json">
{
    "@context": "http:\/\/schema.org",
    "@type": "Article",
    "mainEntityOfPage ": "http:\/\/www.iflscience.com\/environment\/unprecedented-hurricane-harvey-worst-disasters-us-history\/",
    "name": "\"Unprecedented\" Hurricane Harvey Is \"One Of The Worst Disasters In US History\"",
    "headline": "\"Unprecedented\" Hurricane Harvey Is \"One Of The Worst Disasters In US History\"",
    "about": "Environment",
    "dateCreated": "2017-08-28T11:45:31+01:00",
    "datePublished": "2017-08-28T15:21:00+01:00",
    "dateModified": "2018-01-22T04:34:12+00:00",
    "position": 1,
    "author": {
        "type": "Person",
        "name": "Robin Andrews"
    },
    "publisher": {
        "type": "Organization",
        "name": "IFLScience",
        "logo": {
            "@type": "ImageObject",
            "url": "http:\/\/cdn.iflscience.com\/assets\/site\/img\/iflscience_logo.png?v=1.2.17"
        }
    },
    "keywords": "flooding",
    "image": {
        "@type": "ImageObject",
        "url": "http:\/\/cdn.iflscience.com\/images\/8511613c-bb53-592d-a48b-81e8fc4bd8cb\/default-1503917131-cover-image.jpg",
        "height": "619",
        "width": "1100"
    }
}
</script>
	<div id="__page__" style="display:none;" data-article-id="43441" data-author-id="74" data-category-id="30" data-category="Environment" data-template="default" data-paginated="2" data-current-page="1"></div>
	<script id="__advert_config__" type="application/json">{"dfp":true,"taboola":true}</script>
    <div class="cookies">
	<i class="ion-android-close close"></i>
	<p><strong>This website uses cookies</strong></p>
	<p>This website uses cookies to improve user experience. By continuing to use our website you consent to all cookies in accordance with our cookie policy.</p>
</div><div id="__environment__" style="display:none;" data-base-url="http://www.iflscience.com" data-articles-base-url="http://www.iflscience.com" data-debug="1" data-version="1516641763"  data-route="article" data-api-base-url="http://api.iflscience.com" data-assets-base-url="http://cdn.iflscience.com" data-images-base-url="http://cdn.iflscience.com/images" data-live="1"></div>
	<script src="http://cdn.iflscience.com/assets/site/build/app.1.2.17.js?v=1.2.17" async defer></script>
	<script src="https://apis.google.com/js/platform.js" async defer></script>
	<script src="https://cdn.optimizely.com/js/9010110520.js"></script>
	  <script>
    var _comscore = _comscore || [];
    _comscore.push({ c1: "2", c2: "18981470" });
    (function() {
      var s = document.createElement("script"), el = document.getElementsByTagName("script")[0]; s.async = true;
      s.src = (document.location.protocol == "https:" ? "https://sb" : "http://b") + ".scorecardresearch.com/beacon.js";
      el.parentNode.insertBefore(s, el);
    })();
  </script>
  <noscript>
    <img src="http://b.scorecardresearch.com/p?c1=2&c2=18981470&cv=2.0&cj=1" />
  </noscript>
	                <script src="//secure-dcr.imrworldwide.com/novms/js/2/ggcmb500.js"></script>
  <script>
    var _nolggGlobalParams = {sfcode : "dcr",apid : "P5BDCAA6D-4614-4519-8BF6-93F74DE2A5F9", apn : "test-static"};
    var gg1 = NOLCMB.getInstance(_nolggGlobalParams);
    gg1.ggInitialize(_nolggGlobalParams);
    var staticmeta = {
      type:"static",
      assetid:"environment",
      section:"Environment",
      segA:"",
      segB:"",
      segC:""};
    gg1.ggPM("staticstart",staticmeta);
  </script>
	<div class="OUTBRAIN" data-widget-id= "TR_1" data-src = "" data-ob-template="IFLScience" ></div></body>
</html>
