A storm hit the California counties of Napa and Sanoma on February 7, resulting in serious flooding. This drone footage shows the effect of flood damage on the area.Flash flood warnings were issued for rivers and creeks in Napa and the nearby areas of Alameda, Marin and Santa Cruz counties, according to local reports. Flooding also left several drivers stranded on Highway 121 in Sonoma County and forced many schools in the area to close. Credit: Clayton Inskeep via Storyful