How Long Will the Heat Wave Endure in the High Desert?
The early-season, record-breaking heat wave that pushed temperatures past the 100-degree mark in parts of Southern California is not going away anytime soon. This intense weather event has already set a new precedent for the region, with many areas experiencing temperatures far above what is typical for this time of year.
According to the National Weather Service, the ongoing heat wave that began on Tuesday, March 17, will continue while expanding across the Central U.S. through the weekend and possibly beyond. Most areas are expected to see temperature high temperatures 25 to 35 degrees higher than normal for this time of year. While some regions like the Victor Valley and Barstow haven’t broken any records yet, they have still experienced high temperatures in the mid-90s.
On Thursday and Friday, Adelanto, Apple Valley, Hesperia, and Victorville all sweltered near the 94-degree mark, while Barstow nearly reached triple digits. The San Bernardino mountain communities also warmed up, with highs in the 70s and 80s. Overnight low temperatures have also been well above average, adding to the discomfort of residents.
Heat wave round two
Temperatures across the desert and mountains will drop a few degrees over the weekend, but will remain 10 to 20 degrees above average, according to the NWS. The second round of the heat wave is expected from Monday through Wednesday, with a possible repeat of similar temperatures experienced last week. The long-range forecast includes High Desert temperatures possibly returning to the 80s on March 26 and into the 70s moving into April.
Protecting sensitive populations
Weather officials have warned that the early time of year, prolonged heat wave, and limited seasonal acclimation will increase the risk of heat impacts, especially among sensitive populations or those without effective cooling. People are encouraged to adjust plans to limit strenuous outdoor activities to early morning hours, drink plenty of fluids, and seek air-conditioned spaces.
Young children and infants are particularly vulnerable to heat-related illness and death, as their bodies are less able to adapt to heat than adults, experts cautioned. Older adults, particularly those who have pre-existing diseases, take certain medications, live alone, or have limited mobility, who are exposed to extreme heat can experience multiple adverse effects. People with chronic medical conditions are more likely to have a serious health problem during a heat wave than healthy people.
Pregnant women are also at higher risk. Extreme heat events have been associated with adverse birth outcomes such as low birth weight, preterm birth, and infant mortality, as well as congenital cataracts. It is never safe to leave a child, disabled person, or pet locked in a car, even in the winter. If you have a toddler in your household, lock your cars, even in your own driveway.
Kids may play in cars or wander outside and get into a car, and can die in 10 minutes. A reported 39 children died in hot cars in 2024. For more information, safety tips, resources, and a list of possible cooling centers statewide, visit news.caloes.ca.gov/coolingcenters.
California weather radar
Daily Press reporter Rene Ray De La Cruz may be reached at RDeLaCruz@VVDailyPress.com. Follow him on X @DP_ReneDeLaCruz
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