At least 10 people have died and at least 1,500 homes, businesses and other structures have been destroyed as more than 14 fires ravaged eight counties throughout Northern California on Monday, authorities said.

The Sonoma County Sheriff’s Office reported seven fire-related deaths late Monday. In addition, two died because of the Atlas fire in Napa County, said a CalFire spokesperson. One person died as result of the Redwood Valley fire in Mendocino County.