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.

While California saw devastating wildfires in Los Angeles at the start of the year, the state has experienced an average summer fire season, with only one blaze, the Gifford fire, surpassing 100,000 acres. Fire activity is expected to pick up in coming days as the state bakes in a heat wave.

Two major wildfires in California and Oregon force mass evacuations as firefighters battle blazes amid dangerous heat conditions.