Jul 19, 2023; Phoenix, AZ, USA; Jody Thompson sells cold water to the fans in the 116 degree heat arriving for the Morgan Wallen concert at Chase Field. Phoenix set three new records on Wednesday with a low of 97 degrees, a high of 116 degrees, and it was the 20th day in a row of temperatures of 110 degrees or more. Mandatory Credit: Rob Schumacher-USA TODAY NETWORK
Sacramento, California – Millions of California residents are under heat advisories as an extreme heat wave is set to sweep across the state beginning Friday, with temperatures expected to soar well above 100 degrees in many regions. The National Weather Service (NWS) has issued extreme heat watches and advisories for large portions of the Central Valley, Sacramento Valley, Sierra foothills, and other inland communities. The scorching temperatures are expected to last through Sunday morning.
Officials are urging residents to take immediate precautions. The NWS has emphasized the importance of staying indoors during the hottest parts of the day, remaining hydrated, and checking in on vulnerable populations such as the elderly, young children, and outdoor workers. With high daytime temperatures and minimal overnight cooling, the risk of heat-related illnesses is significantly elevated, especially in areas without access to air conditioning.
In the San Joaquin Valley, Kern River Valley, and lower Sierra Nevada foothills, temperatures could peak at 105 degrees Fahrenheit. Cities including Merced, Fresno, and Bakersfield are among those facing the highest risk. According to the NWS office in Hanford, the combination of extreme heat and humidity could lead to serious health impacts without proper precautions.
Further north, Sacramento and the Northern San Joaquin Valley are under an Extreme Heat Watch, with highs predicted to range from 99 to 109 degrees. Even nighttime lows, expected in the mid-60s to mid-70s, may offer little relief. Health officials warn that prolonged exposure without breaks can lead to heat exhaustion or even heat stroke.
Coastal areas will fare better, with temperatures expected to remain in the 60s and 70s. However, inland cities such as Redding, where conditions are expected to be particularly intense, may see a rise in hospital visits. Michelle Shahbon, ER Manager at Shasta Regional Medical Center, said seniors, children, and those with preexisting conditions are at heightened risk. “We strongly advise residents to stay hydrated, limit outdoor activity, and monitor early signs of heat illness,” she said.
Meanwhile, NWS offices in Las Vegas and Hanford are warning of extreme heat across southern Nevada and eastern California, including Las Vegas, Pahrump, Lake Mead, and Death Valley, where temperatures could exceed 115 degrees.
In addition to heat illness, officials are cautioning against sun exposure. Overexposure to ultraviolet radiation can cause skin cancer, eye damage, and premature aging. Public health experts advise wearing sunscreen, protective clothing, and avoiding the sun during peak hours. Parents are urged to shield children, as early sunburns can double the risk of melanoma later in life.
Authorities will continue to monitor conditions and update warnings as needed.
