The tractor trailer with a fake plate was carrying 67 migrants when it was found on Monday, Francisco Garduno Yanez, head of Mexico’s National Immigration Institute, said at a press conference on Wednesday.
There was no sign of water in the refrigerated tractor-trailer and no visible working air conditioning unit, according to San Antonio Fire Chief Charles Hood. Those found alive were hot to the touch and suffering from heat stroke and exhaustion.
Temperatures in San Antonio climbed to 101 degrees Fahrenheit (38.3 degrees centigrade) on Monday, while the heat in the packed trailer was likely way higher than that, according to the U.S. National Weather Service.