Extreme Heatwave Records Broken Across Western United States
This week’s early-season heatwave has shattered multiple all-time temperature records in California and Arizona. The scorching conditions were particularly pronounced on Wednesday and Thursday, prompting significant concerns about public health and safety.
Heat Warnings Impact Millions
Close to 38 million residents in Southern California and the desert Southwest are currently under heat warnings. The region is experiencing unusually high temperatures, with many areas reaching into the low 90s and even triple digits. This intense heat is a result of a stationary heat dome hovering over the western United States.
Record-Breaking Temperatures in California
On Thursday, Palm Springs set a remarkable record, hitting 107 degrees Fahrenheit—the highest-ever March temperature recorded in the city. This surpassed the previous day’s record of 105 degrees. In the Coachella Valley, Indio reached an astounding 108 degrees, marking a new pinnacle for March temperatures.
Daily Records Shattered Across the Region
Numerous daily temperature records were broken throughout California, including a high of 101 degrees in Riverside on Thursday. Other significant temperatures included 95 degrees in Anaheim, 88 degrees in Sacramento, and 85 degrees recorded in both San Francisco and San Diego, according to the National Weather Service.
Arizona Sets New Temperature Milestones
In Arizona, the Lake Martinez area of Yuma County recorded a staggering 110 degrees on Thursday, which is now recognized as the hottest March temperature in U.S. history. Meanwhile, Phoenix experienced a high of 102 degrees on Wednesday, marking the earliest date in the year for triple-digit temperatures; this rose to 104 degrees the following day.
Continued Heat Dominating the Southwest
Forecasts indicate Phoenix will reach 106 degrees on both Friday and Saturday, with an ongoing heatwave warning valid until Sunday. Las Vegas also made headlines by setting a new March record of 95 degrees on Thursday, with predictions of temperatures soaring to 100 degrees by Friday.
Unseasonably Warm Weather Extends Beyond the Southwest
The unseasonably warm climate isn’t limited to California and Arizona. Regions in Oregon, Idaho, and Wyoming are also feeling the impact. Boise, for example, recorded an 80-degree high on Wednesday, the earliest date to hit this temperature since 1875.
Potential Risks Amidst the Heat
The current heatwave, generated by a persistent high-pressure ridge, shows no signs of subsiding, with temperatures expected to escalate into the weekend, spreading eastward towards the Rocky Mountains and the south-central Plains. The National Weather Service has cautioned that high temperatures will reach into the mid to upper 90s across Texas and even into parts of Nebraska and South Dakota, significantly increasing the risk of wildfires due to the combination of extreme heat, strong winds, and low humidity.
