"Mexico Worries That A New Border Wall Will Worsen Flooding"

"As the White House pushes Congress to fund President Trump's U.S.-Mexico border wall, a new wrinkle has emerged that could stymie parts of the massive project.

Mexican engineers believe construction of the border barrier may violate a 47-year-old treaty governing the shared waters of the Rio Grande. If Mexico protests, the fate of the wall could end up in an international court.

Antonio Rascón, chief Mexican engineer on the International Boundary and Water Commission, said in an interview with NPR that some border wall proposals he's seen would violate the treaty, and that Mexico would not stand for that."

John Burnett reports for NPR's Morning Edition April 25, 2017.