Exceptionally high tides have flooded roads, homes and businesses from Southern California to the Bay Area, forcing emergency measures in coastal communities and raising fresh concerns that this week’s disruption may be only an early warning of a more dangerous winter ahead.
LOS ANGELES/SAN FRANCISCO, 31 October 2026 – A stretch of record-breaking high tides has caused widespread disruption along the California coast, with local authorities scrambling to protect neighbourhoods, roads and businesses as seawater pushed into low-lying areas.
In Newport Beach, city officials declared a local emergency ahead of the late-October tidal surge and activated emergency operations measures as coastal flooding threatened the Balboa Peninsula and other vulnerable waterfront areas. The city said the tide reached about 8.4 feet on 27 October, with crews operating pumps, reinforcing berms and distributing sandbags.
Records broken along the coast
Further south, the National Weather Service in San Diego said several of the highest water levels ever recorded there occurred during the past week. The highest was registered on 27 October, when the water level reached 2.80 feet above mean higher high water, equivalent to 8.52 feet on the local tidal scale.
The agency said five of the ten highest water levels on record in San Diego were likely to have occurred between Sunday and Thursday this week. Similar flooding was reported elsewhere in Southern California, while San Francisco Bay and other northern coastal locations also faced minor to moderate inundation.
Why the water is running so high
Forecasters say the flooding is the result of several forces combining at once: the full moon’s higher astronomical tides, elevated sea levels linked to unusually warm ocean water, and the effects of a strengthening El Niño. In Southern California, the National Weather Service said sea levels were running around 17 inches higher than a year earlier.
That combination has created what officials describe as “sunny day” flooding, meaning serious inundation without the need for a major storm.
A warning for the winter ahead
If this week’s tides were disruptive, officials warn that the more serious test may still be coming. Higher king tides are expected around Thanksgiving and Christmas, and the National Weather Service said water levels could be even greater during those periods.
That raises the risk that high tides, storm surf and winter rainfall could strike together, amplifying the threat to coastal infrastructure and property. For California, this week’s flooding was not simply an inconvenience. It may have been a preview of the season ahead.
NewsHub Finance | Climate | 31 October 2026
Exceptionally high tides have flooded roads, homes and businesses from Southern California to the Bay Area, forcing emergency measures in coastal communities and raising fresh concerns that this week’s disruption may be only an early warning of a more dangerous winter ahead.
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