El Niño Arrives: SoCal Prepares for a Potentially Wet and Ocean-Changing Winter

El Niño has arrived with a 63% chance of a very strong event later this year, increasing the odds of a wetter-than-normal California winter. Past very strong El Niños brought heavy rain and damage, though rainfall isn’t guaranteed and coastal hazards like large waves and rip currents can accompany wetter years. Beyond weather, warmer Pacific waters and marine heat waves linked to El Niño may affect ocean life—with more jellyfish and sharks, kelp loss, and stress to other species—likely keeping ocean conditions unsettled into next winter.