Caltrans will close State Route 37 in both directions between Mare Island and Sears Point from 10 p.m. October 23 to 5 a.m. October 26, 2026, to raise flood-prone lanes before El Niño.
Water at San Francisco’s tide gauge hit 7.57 feet on October 11, about 1.5 feet above forecast and above every king tide NOAA predicts this winter; the November, December and January dates are below.
With California under a state of emergency ahead of a forecast very strong El Niño, San Francisco offers free sandbags six days a week, a 100-year flood map and grants of up to $100,000 for flood-proofing.
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