Record Ocean Warmth Fuels Flood Risks in California
Record Ocean Warmth Fuels Flood Risks in California
US · Published Oct 31, 2026
• An unusual low-latitude storm is approaching Southern California, bringing Halloween rain and a serious flood threat to the Four Corners region.
• Record-high ocean temperatures along the California coast, driven by a strengthening El Niño, are contributing to extreme coastal flooding and erosion.

Impact & Risks

The record-high ocean temperatures and coastal flooding have already damaged hundreds of structures from San Francisco to San Diego, with some homes at risk of collapse. Coastal infrastructure, including major roadways and rail lines, has been inundated, leading to closures. In the Four Corners region, communities still recovering from last week's severe flooding face additional risks as heavy rainfall is expected to worsen conditions. The combination of El Niño and climate change is amplifying these hydroclimate extremes, raising concerns about future events during peak king tide periods later this winter.

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