As a potentially historic El Niño event is anticipated for California, local and state agencies are preparing to manage increased precipitation and enhance water supplies. David Feldman, UC Irvine professor emeritus of urban planning and public policy and political science, and director of Water UCI, discussed these preparations in mid-October 2026, as news.uci.edu reported. Feldman, who specializes in water resources management and policy, highlighted how current efforts aim to both replenish water sources and mitigate flood risks.
Orange County and the broader Southern California region are facing a serious water deficit, particularly in the Colorado River, where Lakes Mead and Powell are currently at approximately 30% of their capacity. The prospect of significant precipitation from an El Niño event brings both the possibility of replenishing these critical reservoirs and concerns about potential intensity, especially following the recent tropical storm Rachel which caused coastal damage. Experts are anticipating a large precipitation event across the Southwest and California, prompting preparations to harvest, store, and reuse water instead of allowing it to flow out to sea.
The outlook for local and regional water supplies is largely positive. Increased precipitation could boost water levels in Lakes Mead and Powell, which are vital for Southern California's water and hydroelectric power needs. More locally, the Orange County Water District (OCWD) has been actively preparing to capture rainwater. The goal is to recharge the local groundwater basin, a strategy that proved successful during a rain cycle in 2023. That year, a substantial water harvest enabled the district to avoid purchasing imported water.
The OCWD can capture up to 26,000 acre-feet of water in a single cycle. This volume of water is sufficient to meet the annual needs of approximately 75,000 people. By harvesting this water, the Orange County Water District can save around $26 million, a cost reduction that directly benefits ratepayers. While Los Angeles began its water harvesting efforts later than Orange County, the metropolitan region now has the capacity to capture about 83,000 acre-feet of water annually, enough for around 250,000 people, much of which is stored in areas like the San Fernando Valley.
The State of California is also actively preparing. Efforts are underway to maximize surface and groundwater storage opportunities during the coming winter. This strategy is not only for immediate supply but also to secure water resources for when dry conditions inevitably return, likely by next summer. Governor Newsom’s water supply strategy includes initiatives to enhance groundwater recharge, which aims to improve water resiliency and security while simultaneously reducing flood vulnerability. More harvested water means less surface runoff that could damage homes and property.
The Department of Water Resources (DWR), the state agency leading this strategy, has been hosting "Recharge Readiness" webinars across California. These sessions provide technical guidance to local communities, helping them prepare for potential storms and optimize water harvesting. Additionally, the State Water Project, a key water supply infrastructure initiated in the 1960s, is undergoing maintenance and inspection. These efforts ensure the project is ready for winter to capture, store, and move water, maintaining flexibility to adapt to changing water supplies.
Overall, the concerted efforts by state and local agencies, including the OCWD, highlight a proactive approach to managing Southern California’s water future. The focus is on leveraging anticipated precipitation to build resilience against future drought periods and to protect communities from flood damage.
