"HOUSTON — With clay soil and tabletop-flat terrain, Houston has endured flooding for generations. Its 1,700 miles of man-made channels struggle to dispatch storm runoff to the Gulf of Mexico.

Now the nation's fourth-largest city is being overwhelmed with more frequent and more destructive floods. The latest calamity occurred April 18, killing eight people and causing tens of millions of dollars in damage. The worsening floods aren't simple acts of nature or just costly local concerns. Federal taxpayers get soaked too.

Extreme downpours have doubled in frequency over the past three decades, climatologists say, in part because of global warming. The other main culprit is unrestrained development in the only major U.S. city without zoning rules. That combination means more pavement and deeper floodwaters. Critics blame cozy relations between developers and local leaders for inadequate flood-protection measures."

Frank Bajak and Seth Borenstein reports for the Associated Press May 18, 2016. [2]