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26 human smuggling victims. these people were just laying down in there, exposed to the elements. reporter: in barracks county, where the heat index 116 today, the alleged smuggling victims were brought to a wooden shed. miserable conditions are just blazing hot in there. reporter: as the heat dome expands in phoenix, arizona, and expected high of 113 degrees could break the daily record. we are going to use this rapid cooling back to. be to first responders there demonstrated a potentially life-saving way to treat patients suffering from heat stroke. this cooling bag filled with ice could quickly reduce a person s body temperature. that s our goal, is to increase the survivability by the time we get them through the doors of the hospital. reporter: end in las vegas, road crews laying asphalt triple-digit heat. yeah, we are about 10 degrees hotter right now. this is more like july weather. reporter: now it is expected to cool off by a couple of degrees across much of the west, including here in las vegas, this coming weekend, but norah, that extreme heat is