The amendment to a 1944 treaty will help Mexico catch up with its water deliveries to the U.S. and might help Rio Grande Valley farmers devastated by low rainfall.

The neighboring countries have tussled over the 1944 treaty, which was designed to allocate shared water resources. Mexico is required to send 1.75 million acre-feet of water from

Mexico and the U.S. said they reached an agreement they hope will address Mexico's habit of falling behind on water-sharing payments in the Rio Bravo watershed, also known as the Rio Grande.