Kelvin wave approaches California coast

A large Kelvin wave of warm water is expected to reach the California coast around mid-October. This slow-moving bulge of water, which originated near the equator in the western Pacific Ocean, could temporarily raise sea levels along the coastline by approximately 6 to 12 inches, though some climate scientists suggest levels could rise by as much as 14 inches this winter.

The wave was driven eastward by changes in wind patterns associated with El Niño. Upon reaching the South American coast, the wave split, with the northern branch traveling toward Central and North America. When combined with high tides, storms, or large waves, this event may increase the risk of coastal flooding and erosion.

Experts note that these events may become more frequent due to global warming. In areas like San Francisco and La Jolla, sea levels have already risen by about eight inches over the last century. Scientists indicate that the upcoming winter will serve as a test for the state's ability to manage infrastructure against rising sea levels.