Why is Houston flooding so badly? Blame a bad storm and urban sprawl

Hurricane Harvey is the most extreme rain event in Texas history. But the city of Houston has some unique geographic and design challenges that have contributed to the flooding disaster. Subscribe to The Washington Post on YouTube: http://bit.ly/2qiJ4dy Follow us: Twitter: https://twitter.com/washingtonpost Instagram: https://www.instagram.com/washingtonpost/ Facebook: https://www.facebook.com/washingtonpost/