Texas floods: How geography, climate and policy failures collided

"There's no such thing as a natural disaster," geographers like to say - a reminder that human choices turn hazards into tragedies. The Texas flash floods this weekend that left more than 100 people dead, including many children, offer a stark illustration. Here is a look at the intertwined forces that amplified this storm's impact. 'Flash Flood Alley' Texas's Hill Country sits in an area known as "Flash Flood Alley," explains Professor Hatim Sharif, a hydrologist at the University of Texas at S