Meteorologists predict more extreme temperatures Sunday as a heat wave continues to grip the US Southwest, leaving one man dead and another hospitalized in serious condition in heat-related incidences. Las Vegas, Nevada, fire and rescue spokesman Tim Szymanski said paramedics on Saturday responded to a call from a home without air conditioning where they found an elderly man dead, RT reported. More than 40 people have sought medical attention in hospitals in Las Vegas since Friday, but no life-threatening injuries have been reported. Temperatures in Las Vegas soared to 115 degrees (46.1 C) on Saturday afternoon, two degrees short of a record, while Phoenix, Arizona, baked at 119 degrees (48.3 C). In Death Valley, temps hit 125 (51.1 C), according to the National Weather Service. Death Valley’s record high of 134 degrees (56.6 C), set on July 10, 1913, stands as the highest recorded temperature on earth.