The caravan is the second to begin in Mexico since October 1, when President Claudia Sheinbaum assumed office.

New Mexico’s rising deaths come as human-caused climate change increases the likelihood of heat waves. This year, the El Paso area had its hottest June ever, with an average temperature of 89.4 degrees Fahrenheit (31.8 Celsius). June 12 and 13 saw daily record highs of 109 F (42.7 C).

New Mexico authorities are grappling with a growing number of migrants dying in the state's border region, with the remains of more than 100 found in