Record-Breaking March Temperatures Recorded in the Bay Area

Temperatures in the Bay Area rise during the Month of March

A heat wave caused by a high-pressure “heat dome” trapping warm air in the atmosphere swept across the Bay Area and pushed record temperatures of 15-30 degrees above normal , from March 16 to 20, raising concerns about public health and resources.

Temperatures have been recorded to break records in the month of March, hitting averages in the 80s along the coast and upper 80s to mid-90s inland, according to the National Weather Service. Cities across the region experienced unusual early-season heat, with many areas breaking record temperatures. The sudden spike in temperature was observed in typically mild coastal areas, including Redwood City and Oakland.

Meteorologists from the Bay Area’s National Weather Service reported that the heat wave was driven by a persistent high-pressure system, known as a “heat dome,” which blocked cooler marine air from moving inland. This pressure system allowed heat to build over several consecutive days, creating an extended period of unusually high temperatures. Overnight temperatures also remained elevated, offering little relief and increasing discomfort for residents across the region during this period. 

Although temperatures began to cool after several days on March 20, the event left an impact on affected residents and officials. A local resident, Yujin Cha, from San Jose reports she has “never experienced such heat in the month of March in San Jose.” She adds that it felt like summer came early, and people should be more mindful of staying hydrated and being in the heat. 

Extreme heat is a public health threat that targets populations more prone to heat-related illnesses or deaths. These populations include children, elderly people, outdoor workers, individuals with chronic health conditions, and communities with limited access to cooling resources. The Weather Forecast Office in the Bay Area advised individuals to take precautions to reduce the risk of heat-related illnesses. Residents were encouraged to drink plenty of water, avoid leaving children, the elderly, or pets in unattended vehicles, and take breaks in air-conditioned spaces or in the shade. They were also recommended to reallocate outdoor activities to cooler times of the day, such as early morning or evening hours.

Another impact of the heat wave in the community is seen with California’s water supply. According to the California Department of Water Resources, mountain snowpack provides about a third of California’s water supply by accumulating snow during wet winters and releasing it slowly throughout dry springs and summers. Warmer temperatures melt the snow faster, making it difficult to store and use throughout the dry season. As temperatures across the globe continue to increase due to climate change, snowcaps and the water available from them become scarcer.

While a heat wave cannot be directly attributed to climate change, experts say that climate change can increase the likelihood and intensity of heat waves. The recent March heat caused concern for the growing changes and challenges posed by global warming and the need for improved preparedness and resources to address it.