The Ocean off California Keeps Breaking Heat Records

An extreme marine heat wave is simmering the Pacific Ocean off the coast of California, and experts are warning that it could affect coastal weather and ecosystems for months.

The ocean heat wave started forming at the end of last year but has worsened in recent weeks, according to readings from the Scripps Pier in La Jolla, which has broken more than 25 daily temperature records this year. The surface water temperature on Wednesday was 68.5 degrees — 7.7 degrees above average for the date. The sea bottom was 67.6 degrees, the hottest April 15 in about 100 years of records.