The fifth largest wildfire in state history, the Park Fire, grew marginally overnight, but destruction from the massive blaze that has burned through Butte and Tehama Counties continues to grow.

The California Department of Forestry and Fire Protection said Wednesday morning that 277 structures have been destroyed by the fire and 29 structures have been damaged.

Cal Fire said those numbers include homes, commercial buildings, outbuildings and other structures.

The acreage burned by the Park Fire increased Wednesday morning to 389,791 acres, up about 3,000 acres from Tuesday night, Cal Fire said.

The fire remains at 18% contained.

The bulk of the fire has burned in Tehama County, with 333,765 acres already torched, while 52,999 acres has burned in Butte County, Cal Fire said.

However, most of the destruction the fire has done has been in Butte County.

Of the structures lost, 214 have been in Butte County, Cal Fire said, adding that damage inspection teams have completed 70% of their assessments.

The Park Fire started July 24 in Upper Bidwell Park in Chico and rapidly spread north, racing through Tehama County before it was stopped just shy of the Shasta County line. Thousands of people have been evacuated ahead of the blaze.