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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