Standard homeowners insurance policies don't cover flood damage, this peril poses a real risk to California residents living in designated high-risk flood areas. Floods can occur from heavy rains, overflowing rivers, or coastal surges and leave devastating damage in their wake. Home flood insurance provides vital coverage for repair or full replacement costs of your home's structure, interior systems, appliances, and personal possessions after a flood event. For homes in designated high-risk areas, flood insurance is federally required before securing a mortgage.