CALIFORNIA—Wildfires have burned more than 220,000 acres in Northern California since Sunday, October 8. The fires are expected to continue throughout the week despite massive firefighting efforts.

At least 15 different blazes remain active in Yuba, Napa, Sonoma, and Mendocino Counties. As of October 15, firefighters have made significant progress battling the infernos and contained large portions of several fires. Up to 10,000 firefighters from across California and neighboring states have worked around the clock to control the corral the fires. Inmates from California prisons have also volunteered to assist with battling the blazes.

Meteorologists from the National Weather Service believe firefighting efforts could improve over the next few days with winds from the southwest expected to bring more moisture and cooler temperatures to the inland regions.

The number of homes destroyed by the fires totaled 303 as of October 15. At least 40 people have died in what is considered the deadliest wildfires in California history. One hundred and seventy-four are still reported missing in Sonoma County, officials have reported. In Napa County, 74 people still remain unaccounted for.

Over 100,000 people have been evacuated from the region, but a quarter of them have been allowed to return to their homes in recent days.

Wine Country is not the only region in California suffering from the wildfires. More than 9,000 acres and 25 structures have been destroyed in the past week during an Orange County wildfire that is still threatening some portions of Anaheim Hills.