King tides are arriving in California. Here's what they can tell us about rising sea levels
Briefly

Tides are caused by the gravitational pull of the moon and the sun on the world's oceans. During full or new moons, Earth, the moon and the sun are nearly lined up, pulling together to make the oceans bulge slightly more.
In California, most of the focus is on king tides associated with new moons during the winter because of the risk of coastal flooding. Often the flooding is minor "nuisance flooding" of low-lying areas, but it can be more serious.
Read at Los Angeles Times
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