Water levels around the San Francisco Bay Area rose over a foot higher than the tide charts predicted last week as a winter storm arrived during king tides. … One reason that tide predictions were off: sea level rise. The tide charts used by sailors, city planners, surfers and coastal businesses around the country are based on sea levels from roughly the 1990s, but water levels have risen by about 3 inches in the Bay Area in the meantime. Even that small amount can throw off tide predictions and exacerbate flooding, though rain and winds — which also do not get factored into the tide charts — were the main culprits for both.

Other flooding news:

• KQED (San Francisco): The Bay Podcast: For Marin County, last weekend’s floods were a wake-up call​​
• Action News Now (Chico, Calif.): FEMA delivers updated preliminary flood maps for Tehama County