The International Organization of Migration counts 232 migrant deaths on the route through the end of July, up from 204 a year earlier. It comes even though US Border Patrol apprehensions of migrants have fallen nearly by half this year, to just over 140,000.
IOM said today that 50 bodies were found in July alone, including 10 discovered in a truck in San Antonio, Texas.
The Geneva-based agency said the higher toll couldn't be fully explained. It made no reference to President Donald Trump's calls for tighter border controls, but cited factors like hot weather and swelling Rio Grande waters.