A man died and another was hospitalized in serious condition Saturday afternoon in heat-aggravated incidents as a heat wave blistered this sunbaked city and elsewhere in the Southwest. Forecasters said temperatures in Las Vegas shot up to 115 degrees Fahrenheit (46 Celsius) on Saturday afternoon, two degrees short of the city's all-time record, AP reported. Phoenix hit 119 degrees Fahrenheit (48.3 Celsius) by mid-afternoon, breaking the record for June 29 that was set in 1994. And large swaths of California sweltered under extreme heat warnings, which are expected to last into Tuesday night - and maybe even longer. The forecast for Death Valley in California called for 128 degrees Fahrenheit (53.3 Celsius) Saturday, but it was a few degrees shy of that, according to unofficial reports from the National Weather Service. Death Valley's record high of 134 degrees Fahrenheit (56.6 Celsius), set a century ago, stands as the highest temperature ever recorded on Earth. Las Vegas fire and rescue spokesman Tim Szymanski said paramedics responded to a home without air conditioning and found an elderly man dead. He said while the man had medical issues, paramedics thought the heat worsened his condition. Paramedics said another elderly man suffered a heat stroke when the air conditioner in his car went out for several hours while he was on a long road trip. He stopped in Las Vegas, called for help and was taken to the hospital in serious condition. The heat wave has sent more than 40 other people to hospitals in Las Vegas since it arrived Friday, but no life-threatening injuries were reported. "We will probably start to see a rise in calls Sunday and Monday as the event prolongs," Szymanski said in a statement. "People's bodies will be more agitated the longer the event lasts and people may require medical assistance." About 100 miles (160 kilometers) south in Baker, the temperature peaked at an unofficial 117 degrees Fahrenheit (47.22 Celsius) in the road tripper's oasis in the Mojave Desert on Interstate 15. The strip of gas stations and restaurants between Los Angeles and Las Vegas is known by travelers for the giant thermometer that often notes temperatures in the triple digits. Elsewhere in Southern California, Palm Springs peaked at 122 degrees Fahrenheit (50 Celsius) while the mercury in Lancaster hit 111 Fahrenheit (43.9 Celsius) - a record.