La Niña Could Spell Trouble for California’s Water Supply and Increase Flood Risk, Experts Warn
California’s water supply and flood risk could be in for a rollercoaster ride over the next 12 months, as state officials prepare for looming La Niña climate conditions following a hot, dry summer. According to experts from the Department of Water Resources (DWR), the state’s water year, which began on October 1, could bring extreme weather challenges.
In a recent media briefing, DWR Director Karla Nemeth emphasized that California is bracing for more intense weather patterns in the months ahead.
“California has experienced the full range of climate challenges in recent years, from extreme drought to severe flooding, and we will be seeing more of that in the future,” Nemeth said. “To meet these dramatic challenges, California is starting this water year with more accurate forecasting and additional investments in flood protection and groundwater recharge.”
The National Oceanic and Atmospheric Administration’s (NOAA) Climate Prediction Center predicts a 71% chance of La Niña conditions developing this fall. Historically, La Niña years have been dry 70% of the time over the past century. However, state officials caution that any precipitation California does receive is likely to come through stronger, more intense storms.
Adding to the concern, California’s landscape has been scorched by record heat and dry conditions this summer, making the soil especially prone to flooding when heavy rains do arrive.
State climatologist Michael Anderson highlighted this risk, stating, “California experienced record heat and dry conditions this summer, drying out the landscape and putting our hydrology behind before the water year even starts. While there is still a lot of uncertainty around how La Niña could impact the state this year, we know we can count on it to include extreme conditions.”
To better prepare for these potential extreme weather events, California has invested in tools like Forecast Informed Reservoir Operations (FIRO). This system enables water managers to coordinate early releases of water into the Yuba and Feather rivers ahead of atmospheric river events, helping to protect against potential flooding.
