The potential for heavy rainfall during the El Niño winter poses a significant risk to California homeowners and renters, particularly those in areas not traditionally considered high-risk flood zones. More than 40% of FEMA flood claims occur outside these zones, highlighting the widespread vulnerability. Properties where rainwater can flow downhill or where rising water can enter living spaces are especially at risk. Without adequate insurance, property owners may face substantial financial losses, as standard homeowners insurance typically excludes flood damage. Additionally, outdated FEMA flood maps may leave some residents unaware of their true exposure to flooding.