.....California is not just experiencing a heatwave on land.
— Colin McCarthy (@US_Stormwatch) March 21, 2026
A Category 3 to locally Category 4 marine heatwave has developed off the Southern California coast.
La Jolla in San Diego recorded a water temperature of 71°F (21.7°C) yesterday on the last day of winter. That's warmer… pic.twitter.com/nE2BFtfBYJ