Low-lying areas near shorelines and tidal waterways are at risk of flooding, with up to 1.6 feet of inundation above ground level possible. Coastal erosion and isolated road closures are expected. Beachgoers face hazards from sneaker waves and rip currents, which can pull individuals into the sea. Communities from Mill Valley to Palo Alto are experiencing unusually high water levels, and infrastructure such as roads and backyards has already been affected.