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).

Ten times as many migrants died in New Mexico near the U.S.-Mexico border in each of the last two years compared with just five years ago as smuggling gangs steer them — exhausted, dehydrated and malnourished — mostly into the hot desert,