The Federal Emergency Management Agency (FEMA) is conducting a detailed study to map the flood risk and associated hazards for the City of Calistoga and the County of Napa, California. Impacted waterways reaching in and around Calistoga, Napa County will include Napa River, Ritchie Creek, Biter Creek, Simmons Canyon Creek, Unnamed Creek, Cyrus Creek, Blossom Creek, Garnett Creek and Garnett Creek Tributary.