Vector outline map of California showing counties affected by the Christmas flood of 1964. The thirty-four colored counties were all declared disaster areas, and the six red counties sustained more damage than the other twenty-eight combined. Derived from a United States Census publication.
California_counties_outline_map.svg
California_counties_outline_map.svg: *California_county_map.svg:  United States Census Bureau
derivative work: Babbage (talk)
derivative work: Little Mountain 5 (talk)