Fierce floods or wild waves? How San Diego is preparing for a winter of extreme weather under El Niño.

San Diego is preparing for a winter of extreme weather under a 'super El Niño' season, which could bring floods, low rainfall, or severe coastal erosion. Aging stormwater systems and century-old dams heighten risks, prompting the city to form an El Niño working group across departments to monitor vulnerable areas like creeks and lakes.