Ten structures — including four homes — have been destroyed by a wildfire sweeping through central Oregon as thousands of homes in the state and in Northern California wine country remained under evacuation orders Monday.

Wildfires in California wine country and Central Oregon grew overnight, prompting hundreds of evacuations as firefighters sought to contain the blazes Sunday amid dry, hot weather.

Multiple wildfires have already erupted in parts of the western United States, including in Oregon and California's Napa County.