Death Valley could approach 130 F as heat intensifies over SouthwestTemperatures in the scorching hot Southwest are expected to climb higher in the coming days. CopiedAs high pressure remains parked over the Southwest, temperatures could potentially break records that have stood for nearly 50 years. Due to the long-duration heat wave, excessive heat warnings were in effect across the Desert Southwest, including in cities such as Phoenix, Las Vegas and Palm Springs, California. In the City of Angels, a heat wave is three or more days in a row with high temperatures of 90 or greater. Las Vegas is another desert metro area that has an excellent chance of approaching its all-time record high.