Scientists calculate that July will prove to be the hottest globally on record and perhaps the warmest human civilization has seen. Storms gradually increasing in strength are expected over the weekend. While more than half of the greater Phoenix area saw no rainfall from that storm, some eastern suburbs were pummeled by high winds, swirling dust and localized downfalls of up to 1 inch (2.5 centimetres) of precipitation. One firefighter was reported to have been injured in the so-called Bonny Fire, which authorities said was about 5% contained.Ī downward trend in Southwest heat started Wednesday night, when Phoenix saw its first major monsoon storm since the traditional June 15 start of the thunderstorm season. In Riverside County, more than 1,300 people were ordered to evacuate their homes and another 1,400 were facing evacuation warnings as crews battled a wildfire that charred 3.2 square miles (8.3 square kilometers) in the community of Aguanga, about 60 miles (96 kilometers) northeast of San Diego, authorities said Saturday. Hot, dry weather was also expected across nearby valleys, lower mountains and desert areas. Gusty, late-afternoon winds were expected Saturday and Sunday in Santa Barbara County, posing an elevated risk of fire weather, the weather service in Los Angeles said. Temperatures also were expected to ease in Las Vegas, Albuquerque and even in Death Valley, California, where the weather service said the expected high of 122 F (50 C) on Saturday is forecast to lower to 113 F (45 C) by Tuesday - along with a slight chance of rain.Īlso in California, triple-digit heat was expected in parts of the San Joaquin Valley from Saturday through Monday, according to the National Weather Service in Hanford, California. Sudden rains running off hard-baked surfaces can quickly fill normally dry washes.Īlready this week, the overnight low at Phoenix Sky Harbor International Airport fell under 90 F (32.2 C) for the first time in 16 days, finally giving residents some respite from the stifling heat once the sun goes down. Though wet weather can also bring damaging winds, blowing dust and the chance of flash flooding, the weather service warned. There are increased chances on Sunday of cooling monsoon thunderstorms. Climate Barometer newsletter: Sign up to keep your finger on the climate pulse.The previous record stretch of 110 F or above was for 18 days in 1974. The high temperature in the desert city with more than 1.6 million residents climbed past 110 F for the 30th straight day, the National Weather Service said. Southwest throughout July, blasting residents and baking surfaces like brick, is beginning to abate with the late arrival of monsoon rains.įorecasters expect that by Monday, people in metro Phoenix will begin to see high temperatures fall under 110 degrees Fahrenheit (43.3 degrees Celsius) for the first time in a month.īut not on Saturday. A historic heat wave that has gripped the U.S.
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